The tasks on github are very well tagged and organized, there should be either a set of new tags representing the reward amounts, or existing tags should be mapped to the reward amount.
https://github.com/farcasterxyz/hub/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22
There should also be a certain limited amount of small tasks to incentivize larger contributions as well.
In this current form, I find the scope of the proposal vaguely expressed.