I don't see that, maybe because I haven't installed any updates or something. Bit Coinomi is kind of doing the same thing, including advertising on the main screen of the wallet. I agree it's a horrible fucking idea, but it doesn't surprise me in the least that they're doing it. They're whores just like everyone else in cryptoland. I'll take a look at my mycelium wallet now, see if I missed something. Cloud mining is nothing but a scam.
Edit: I have the buy/sell thing blocked in my preferences, so maybe that's why I don't see it.
I had to stop using Mycelium because of this kind of behaviour. After reading this post, I checked Mycelium again and I can't see the "Buy RMC" button anymore. Can someone else confirm if it's still there? Maybe they removed them in a very recent update?