No, that works well IME. If it's worth something towards the final grade, even 1%, most students will do it. It can be hard to persuade some of my students no

No, that works well IME. If it's worth something towards the final grade, even 1%, most students will do it. It can be hard to persuade some of my students not to spend multiple hours attempting to get 0.1% more of the course grade by doing another quiz attempt when they've already achieved 90% - I think they're better off moving on to the next thing.