I've heard of it. Personally, I do not waste my time with apps like these. I'm moving into s19 and s21 applications to find ways to get cheap sats. Nuilding out a 300kw fsrm is not easy but your for the investment you'll get a higher return.
you can buy an s9 and use it for heat mitigation and get sats that way.
playing with apps like ember is exactly that...playing.
