I don't mean that they're not a real, valued part of the game. But having them (or not) won't ever decide a match or leave an engagement unbalanced. If you see someone with a cool gold skin and think "oh I might want that", that's healthy. If you see them with a Super Flatline With Infinite Missiles Only $3 This Weekend Act Now, you'd throw that stupid game away.
...also, and more realistically; this being a competitive MP game, it's already a giant and ongoing challenge to balance weapons, abilities, and titans in this game. Once there's an artificial line between "stock" weapons and "paid" ones... oh god. You'll have someone screaming that the Black Diamond Kraber does less damage to titans than the SMR, and you explain that yes but it's balanced by WELL FUCK YOU I PAID MONEY FOR IT DON'T TELL ME WHY YOU BROKE IT. #_#
So. If we went crazy and offered the Glorious Amazing Tone Gold paint job for $500 today... okay, that's dumb, and Respawn what are you doing, but at least it wouldn't ever come anywhere near MP's precious ecosystem.
Totally; and I appreciate that to embarrassing Zach-Braff-ian degrees. =)