I don't, all of the weapons you get from the contracts look pretty shitty to me, so I don't care about getting a chance at a better one.
Skial
Chance
DaivdBaekr
I skipped a couple bonuses but now I do them since there isn't a rush to turn them in and I might as well get gold.
Sargent¥
Doing the bonuses doesn't get you better skins, where did you hear that? Also, if you skipped more than 4, you can't get gold.
Chance
I heard that it gives you a chance at a better skin, was that info wrong? Either way, don't care that the badge can be gold. The bonuses are boring most of the time anywho.
Defibyoulater
Some of them are impossible and some of them are wayyy too easy.