I have no idea either Mycelium is scam or not but I think those who promote scammers are also scam. By considering this if Mycelium promotes 1xbit then I think Mycelium is scammer too. I am not sure either they are promoting or not as I am not using Mycelium..
It means that you are also saying that Barcelona, one of the biggest football clubs in the world is also scammer because Barcelona is also having partnership with 1xbet which is known as the main site or sister site of 1xbit?
I'm mycelium user and I noticed about the ads since few weeks ago. To be frank I'm disappointed to see the ads of 1xbit in mycelium, but I do not think that Mycelium is scammer just because of the ads.