I used to use StayFocusd too and wrote about it (along with other similar tools) at https://nickjanetakis.com/blog/how-to-overcome-procrastinati....

I stopped using it about 3 months ago because eventually you'll naturally want to avoid these problematic sites. I still check the usual sites but now it's much more controlled (a few minutes here and there per day with a 0% urge to go back to checking constantly).