Thanks for your comments.
Hopefully the downtime is for service maintenance as you said.
However, if it's planned, it should be announced prior to the happening. If not, it's ever important to make it clear on their other communication channels e.g Reddit, twitter or even emails to their customers. I don't see that happening anyway. Long in the market has no real value in Crypto world. That's my 2cents.
Your mathematically proof is very interesting, and if that's the case, then we should stay away from GM too. Since it's a non-profitable act from Day1, so there is no point to believe in GM as it sounds like a pyramid scam.