Why do sneaker bots need special proxies?
Release-day anti-bot systems do two things: they blacklist datacenter IP ranges wholesale, and they bind carts and queue positions to the connecting IP. That means you need residential-class IPs, and you need each one to stay stable for the entire checkout flow.
A rotating proxy that swaps IPs mid-session loses the queue position or invalidates the cart — the classic cause of tasks dying at payment. Static ISP proxies avoid that failure mode entirely.