I prefer to use Mycelium for fee purposes because electrum does take much higher fee than mycelium.
False. Electrum always allowed you to set up custom fees. Plus, even while using their fee slide, you could select a fee of 90 sat/byte, while Mycelium's "cheapest" fee option was ~140 sat/byte+ IIRC.
Well, I can't argue with this because they need also some funds so they have advertisement tab but of course, you can ignore that tab instead.
Do they really? I remember that they raised something close to $21 million with their ICO at today's valuation.
And if they need money, launch a paid version without ads or show actual legit ads instead of ICO scams.