@elmau @elbinario
We use captcha to prevent bots creating thousands of accounts, reserving the usernames that could be used otherwise.
We use re-captcha because thats the only captcha supported by user creation system we use in disroot.
Belive me we are ashamed of it, but until now it was the only way. However we are experimenting with a workaround now which will (if successful) eliminate re-captcha from our systems.