Good points and you are correct (I'm the creator of solo.im)

The group is full of founders who all have different experiences and knowledge to pass on. "Quality" can be subject for sure, but I believe founders can help other founders regardless of where they are in the process of starting / running a business.

The big thing is contribution. solo.im / mastermind groups is just one thing of many you can get involved in and get help from when you are a founder.