My whole site [0] is dedicated to pricing and monetization.
Noteworthy items include:
a free email course on pricing [1]
a 30 page teardown of Safari's pricing page [2]
a list of common revenue models [3]
a compendium of some common mistakes that I've seen business make [4]
[1] https://taprun.com/mailing/
[2] https://taprun.com/examples/safari/