The incentive will be to be able to publish in a top tier journal. I suspect what Tao is advocating for is having journals reject such manuscripts.
> No one is going to get a Fields Medal, or tenure, for digesting someone else's results.
I'm sure no one gets a Field's Medal if others can't digest their results.
He says it shouldn't be able to published if they can't explain it. Publishing it is the reward.
Edit: I just saw Tao actually mentions the above essay in his paper.