I don't think it's about the "average user", so much as the occasional "whale" who will spend thousands upon thousands of dollars.
I prefer the generous per-signup payout from cam sites because, with my level of sales to any given sponsor, it's unlikely I'll be lucky enough to catch one of those "whales". People with higher sales volume might prefer to gamble on landing a big account.
Does that make sense? I'm winding down for my day off...
