The real issue here is even more power being put into Valve's hands. I can't willingly support it. Every aspect of this system on Steam workshop simply stacks the deck even more in Valve's favor when they're already the gods of the PC gaming market.
I'll be waiting to see what Nexus puts into place for their donation system and making liberal use of it next time I get a hankering for some heavily modded Skyrim or whatnot. Better to have my refunds for mods that don't work be in virtual bucks that aren't also lining Valve's golden pockets.