I was listening to this Hashing It Out Episode with the founders of Storj[1] yesterday. Apparently IPFS isn't even that resilient. The Storj founders said that if you take a look at the IPFS sub-Reddit, half of the links don't work. That's not to discount what you're asking about, but it seems like the gamification for keeping IPFS files up forever is not a huge issue at the moment.