Off the top of my head I think its either 2 or 10 Karma to get rid of Captcha. I've given you 3 by double upvoting your post (2 for 'insightful' 1 for 'funny').

There is still a timer to prevent spam, it gets shorter as your Karma goes up. A couple of the subs are Karma gated at 100 like s/politics s/news and a couple others that get bots spamming them.

It's just crude anti-botting measures, welcome to Saidit. Also I'm not an admin, I just vaguely remember the rules, so please just don't shoot the messenger if this sounds like a pain in the ass 😅