so the developer of bazqux -- a $30 dollar per year RSS reader -- had his app temporarily blocked by the poast nitter because of rate limiting
the developer uses several VPS to fetch the content and send it to his users so it took a while but he finally got blocked automatically and somebody complained so he decided to bypass this restriction by misrepresenting the app and pretending to be a Windows 10 desktop running Chrome.
I've now caught him bypassing the permanent block on his IP range using a VPN. so he's set up VPN on all his servers to bypass this second block.