What are the cost of these incentives when you are holding a paperweight at some point and all your "payouts" are in the form of private keys that are worth nothing? What if all these great incentives aren't the result of supply and demand, rather artificially propped up in hopes of luring miners in so a 51% can be achieved?
Features drive the market at times (esp. when people keep asking for them), when you have 3x alt coins on merged mining, give the people something they've been asking for a long time (auto-split payouts) and then to sweeten the deal, you also get 3% of any referrals bought cloud hash speed (which for me is almost 20GH/s)... also alerts that are really persistent & accurate...
Well, maybe now some of the pool owners whom turned down the idea of auto-split percentages (and other features) will reconsider, until said day, I'm pretty sure there's going to be a lot of hashing power going to ghash.io just due to the features it has over other pools.