I just used TNGrid as an example. Even though that 46% sounds great, and, as per prorject's status site, total number of users today is 600. Lets imagine Gridcoin is half, which would leave project with 300 hosts...which sounds to me an almost "dead" project. Just compare with SETI or LHC. If GRC incentive moved 1% of gridcoin RAC to TNGrid, project would end "tomorrow".
I dont like artificial manipulation of the incentives. However, the word "incentive" itself needs to be helpful for projects needing it.