On one side, we have BoostPow, Twetch and others exist under the assumption that proof of work can be added to everything in order to create quality filters, remove sybils and solve the Byzantine Generals Problem for all information - not just bitcoin data. On the other, we have PowPing which exists under the assumption that free data can be pushed like a proposal - inviting a tipping economy to create transactions which reward things that have been deemed by the crowd to have value. So, proposals by proof of work or validation by proof of work. That appears to be the duality at play in bitcoin today. Any thoughts on the strengths and weaknesses of the competing thoughts?