They dedicated a tap ( cryptobetting) on their wallet to 1xbit.com and they also have a promotional code that gives 125% on first deposit to new users who register using the code "Mycelium", they are not only paid to advertise but it seems like they are in partnership with 1xbit.com. money is powerful if you ask me. I don't know what options this belong to but Mycelium are fully aware of the advertisement and reporting to them would lead to nowhere.
Check the upper part of the image.
It doesn't show in my wallet yet, but this is bad
Check on media flow or click the cryptobetting tap