[alexlmiller]

Other folks have already pointed out how this is unenforceable, but I'll give a very tangible example.

Twitter (and Instagram) ToS prohibit selling handles and yet I've been on both sides of those transactions before. You just offer the person a "consulting" contract, part of which is delivering the handle

[trogdor]

Why wouldn't the buyer just pay the seller and not bother with smoke and mirrors? It's not as if Twitter or Instagram know about the "consulting" contract.