How are accountgenerators with captchas still possible?

I was asking myself, how there are still account generators (e.g. for Steam) wide available for everyone. Is it that easy to just bypass those tests without a big pricing or even for free? I did a bit of research and saw sites like where you can solve a captcha using an API or public github-repos to generate those account by yourself.

Does Steam simply not care or are there any modern ways to solve this problem without asking for credit cards?