Years ago I ran an adult job training program where welfare recipients were paid to participate. A perfect example of "extrinsic motivation". We all know that "intrinsic motivation" is better - if sacrifice of time, effort, and comfort is personally meaningful, then - in theory! - you're going to be more committed to the process.
Thing is, what gets you in isn't what keeps you there. The hardest part is to jump in. To place yourself within a new web of experience and influence. If monetary incentives are what it takes to make you jump, so be it. New reasons for being there will unfold as new rewards are discovered.
With the vocational training school, trainees discovered the joy of mastering skills. They came in doubtful and greedy; they persisted with confidence and hope. (Of course, not all of them - but many).
I recently read about a government program that paid US farmers to plant cover crops (good for the soil). Basically, financial incentives got the farmers interested - then seeing the results kept them at it, to the point where many no longer even applied for subsidies.
Same principle: crass self-interest gets the ball rolling, then the ball takes on a life of its own.