Web automation economics reveal themselves most clearly in success rates. Datacenter proxies cost $0.50 to $1.00 per IP but achieve only 20-30% success rates on protected sites. Residential proxies cost $3-15 per gigabyte but deliver 85-95% success rates. The cheaper option produces more expensive outcomes because failed requests consume resources without generating value.

The arithmetic at 10,000 desired successful requests:

Proxy Type	Success Rate	Attempts Needed	Failed Requests	Bandwidth Cost
Datacenter	30%	33,333	23,333	$869
Residential	90%	11,111	1,111	$289

With datacenter proxies achieving 30% success rates, you need 33,333 attempts to get 10,000 successful responses. That's 23,333 failed requests. At residential proxy costs of $8 per gigabyte and 3.3 megabytes per request, organizations pay full infrastructure costs ($0.026 per attempt in bandwidth alone) for 23,333 requests that deliver nothing. The proxy connection gets used. The bandwidth gets consumed. The infrastructure processes the attempt. But the data pipeline receives zero business value.

With residential proxies at 90% success rates, you need only 11,111 attempts for the same 10,000 successful responses. The difference: 22,222 fewer wasted requests, each representing computational effort that produced no useful output. Organizations literally pay for work that generates nothing, then pay again when retry logic reattempts the same request.

Failed requests trigger error handling systems. Monitoring tools track the failures. Retry queues manage reattempts. Engineering teams debug why success rates dropped. The direct cost of bandwidth and proxies represents only the visible expense. The hidden cost includes all the infrastructure and human effort required to manage failure at scale.

Smart identity layers that maintain consistent browser fingerprints cost more to build and operate than simple request rotation. Sophisticated TLS fingerprinting that matches real browser signatures requires deeper technical investment than basic header spoofing. Behavioral simulation that mimics human interaction patterns demands more infrastructure than straightforward automation.

But these expensive capabilities dramatically improve success rates. Infrastructure that handles authentication complexity across thousands of sites, manages TLS fingerprinting to avoid detection, and simulates realistic user behavior reduces failed requests from the majority of attempts to a small minority. The upfront investment in infrastructure depth pays for itself through reduced waste.

Success rates determine actual costs:

Success Rate	Cost Per Attempt	Cost Per Success	Cost at 1M Requests
42%	$0.026	$0.062	$62,000
93%	$0.026	$0.028	$28,000

At residential proxy costs of $8 per gigabyte and 3.3 megabytes per request, each attempt costs approximately $0.026 in bandwidth. With 42% success rates, the cost per successful request reaches $0.062. With 93% success rates, that cost drops to $0.028. The infrastructure delivering 93% success rates costs 55% less per successful request despite requiring more sophisticated capabilities.

For one million successful requests, this difference translates to $62,000 in proxy costs at 42% success rates versus $28,000 at 93% success rates. The $34,000 savings in bandwidth alone often exceeds the cost of building the infrastructure that enables higher success rates. Organizations that optimize for upfront simplicity end up paying more in operational waste than they would have spent on infrastructure depth.

The adversarial web accelerates this economic shift. Cloudflare's adaptive challenges and behavioral anomaly detection make simple approaches increasingly ineffective. Detection systems that once flagged only obvious automation now identify subtle patterns that reveal non-human behavior. The success rates that basic infrastructure achieved in 2023 no longer hold in 2025 because the web's resistance has become more sophisticated.

Organizations face a decision: invest in infrastructure depth that handles modern detection, or accept declining success rates and increasing waste. As detection evolves, the economics shift. Infrastructure that seemed unnecessarily complex when simple approaches worked becomes essential when those approaches fail. The break-even point moves closer as waste from failed requests grows.

Building web automation at scale often reveals this reality after deployment. Internal development costs $200,000-330,000 annually in salary overhead before infrastructure expenses of $2,000-10,000 monthly. Teams spend 15-20% of developer time working around CAPTCHAs, rate limiting, and IP blocking. The total cost runs 5-10x higher over three years than initial estimates because nobody accounted for the ongoing engineering effort required to maintain success rates as detection systems evolve.

Infrastructure that seems expensive upfront (residential proxy pools with intelligent rotation, TLS fingerprinting systems that match browser signatures, behavioral simulation that mimics human patterns) becomes the bargain because it eliminates waste that compounds at scale. Minimizing upfront investment maximizes operational cost, while investing in infrastructure depth minimizes waste and delivers better economics over time.

This economic reality becomes visible only at production scale. Pilot projects with hundreds of sessions don't generate enough waste to reveal the pattern. But operations running tens of thousands or millions of sessions discover that success rates matter more than per-session costs. The infrastructure that reduces failed requests from 58% to 7% pays for itself through eliminated waste, even when that infrastructure costs more to build and operate than simpler alternatives.

As detection systems evolve and success rates for basic approaches decline, the economic advantage of infrastructure depth compounds. What organizations can defer today becomes unavoidable tomorrow. Not because infrastructure becomes more expensive, but because waste from failed requests makes simple approaches economically untenable. Eventually, the mounting cost of waste forces the investment.