To answer your question, I am going to link to another forum post (which also links to another).
https://forum.inaturalist.org/t/why-should-people-upload-pictures-of-common-species/7857/12
In short, submit what you want. More data can always be used, but it is up to you how much you want to share. Or if there is a particular project you are associated with and what they want.
I personally try not to submit the same thing from the same place more than once a week, but that is personal preference.