Does anyone use memory tools like Mem0 or SuperMemory or Zep?

I tried signing up on them but couldn’t get why should I pay for it to use it, felt more like forcing a usecase. Does anyone have any actual usecase for this one and there’s no official connector of it on Claude web as well.

If you are a memory user please help with your

1. Usecase
2. How do you interface with it?