You can read about it here:
https://www.reddit.com/r/appsumo/comments/1wvqp76/warning_be_careful_investing_in_socialbu_red_flags/

I wasn't going to leave a negative review, but it's been 8 days, and he still hasn't given me the "tier 4" 150 accounts that appsumo has me mapped to, so I guess I will.

Appsumo and the founder are currently in a standoff; they are fighting to get me my tier 4 and 150 accounts that my plan is mapped to, but he is refusing to cooperate.

He even said multiple times he would give me my limits and hasn't lifted a finger to do so.

Also, the experience using the tool has been horrible; the accounts disconnect all the time, and you have to reconnect them constantly, which makes the tool not ideal for what it's intended to do.

It seems to be a pattern for the founders of these types of tools, "social media schedulers," to lack integrity.