You may not like a wallet advertising a particular service and I understand this. But, that doesn't mean the wallet is not secure.
That's true indeed, but personally I find in-wallet advertising and/or partnering with 3rd party services distasteful, for lack of a better word. Even when the Dash Electrum wallet suddenly displayed
a pro-Ukraine message, I found that to be well beyond what a software wallet should be about. But when we're talking about one that obviously doesn't do their due diligence on a partner or doesn't care about that partner's reputation, that's concerning (to me at least).
I was surprised to see this thread pop up, because I was under the impression that the Mycelium team had stopped development of their wallet. There haven't been many threads about it in the last couple of years, and I was pretty sure it had slipped off people's radar. Interesting.