I made a post about them, if you join in fast you can make a profit but after a few days it`s not worth it https://steemit.com/dogecoin/@actylla/50-bonus-on-your-investments-and-10-daily-forever.

I already received my payments from them and I am sure they will keep paying as long as people deposit more funds and get involved.

I only invested because I was curious and I had some spare bitcoin to play with - there are some HYIPs that have been going on for a long time (1-2years even) but as the op said it most of them are scams.