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Nice work bbarrows! Don't let the numerous comments pointing out the motivational problems monetary rewards can create discourage you. This phenomenon (the overjustification effect, researched by Deci, Lepper and quite a few others) certainly exists, but certain preconditons have to be met for it to become a problem. Most importantly, the person doing the work has to be highly intrinsically motivated. If that person then gets rewareded monetarily (extrinsical motication), the intrinsic motivation gets reduced. The consequence is an increase in quantity and decreasing quality of the productive output of the person.

But there are many situations where people already start with no or only extrinsical motivation: They do it for the reputation (reputation is an extrinsical motivator), they are college students who have to learn the topic anyway (so would profit from a second extrinsical motivator besides passing the test) etc. - basically every case where the person is not motivated doing the writeup because it enjoys that exact moment.

tl;dr: the overjustification effect exists, but will only affect your project marginally. Good luck!