Since a few updates there is a "Buy RMC" button in the main screen, right under "buy and sell bitcoins".

It's a really, REALLY bad idea to include cloud mining bullshit in something that has a long time standing as the very best Bitcoin wallet, especially for beginners.

This is the kind of shit that gives Bitcoin a bad name. Please don't do this. I often advise newcomers to Bitcoin on getting started and I have always recommended Mycelium. This kind of crap would require me to mention "no don't click that, just ignore it", it confuses people. It makes people wary. I currently feel inclined to recommend other wallets for Android (that would probably be Copay or Schildbach even though I like Mycelium's UX much better).

And yeah, I get it, money and funding and cashing out on a large userbase. I understand. And don't get me wrong, you deserve getting paid for your great work and contribution to Bitcoin. Nonetheless I hope you will reconsider this mistake.