I don't begrudge the devs wanting to make money;  I do have a few issues with how aggressive they are with it.

That wait screen during matchmaking seems like a better place for in-game purchase ads than spamming you with them after a match or during the initial load.   We're waiting around for 15-30 seconds regardless... showing us the ads then would be less intrusive yet get more attention.   They'd just have to have a delayed action of "open after match" instead of "open now". 

And cosmetics are an easy win - people want them but they don't create a 'P2W' scenario.   Why not sell badges that mount on your mech and show your division rank or your clan name?