OK, thanks for explaining it. In that case I assume if a person is interested in such an investment he would have to privately contact the site with an offer?!
The site that was mentioned in the OP doesn't highlight which gambling sites are currently in need of investments. 

@TheUltraElite
When you made your investment back in 2016 how did you find out about it?
Did the site advertise they needed investments, where you referred by someone, did you come by it by accident...?