Hmmm...so no ICO or IEO and instead a form of sale I never heard of, more of like an airdrop but with people trusting the project that they will get their BTC back. If they got 7 months worth back, well that's pretty good and confirms some trust issues. You should have put this info in your post, that's some solid stuff right there.
As I can see the team is anonymous, which is kind of tricky, but if people got their btc back, means everything is ok till now. People are often scared of anonymous team following the 2016-2017 mess.
This has good potential of many x's as I see it, especially because of the rumors, but time will tell. Going to buy some just in case and do more research on it.