It’s great you can do it and you’re free to, but not using javascript often means revamping the whole codebase and making everything 5x more complicated.
It’s about creating at least a small barrier for not-very motivated people.
If a script kiddie wants to create a couple accounts and spam a bit, paying for and integrating such a service might just discourage them from actually taking the time.
Just a small cost if you’re dedicated though, for sure
In that case I’m sure they’re enjoying their 60 cents per month