Evaluating a Steam proxy vendor should start with session integrity and latency. Sticky sessions must preserve cart and session cookies across retries and POP failovers; without affinity, QA finds phantom issues that users never see. Ask for p95 and p99 latency, jitter, and error budgets, not just averages, and confirm time-to-first-byte during peak events like seasonal sales. Ban-avoidance hygiene is about respect, not evasion: follow robots guidance, cap concurrency, randomize cadence within narrow bounds, back off on 429/503, and keep header, OS, and locale signals consistent. GSocks isolates projects by keys and subnets so research, monitoring, and localization do not collide, and exposes allow-lists, mTLS, audit logs, and per-POP metrics so teams can trace behavior. Prefer vendors that publish maintenance windows and incident reviews, and that support lawful region and currency testing. With these controls, Steam workflows stay steady, auditable, and fair while your team scales coverage.