To add the context, the site is a simple web app for photo editing with unique twist. And I would like to monetize its usage without the need of people paying for it (or for premium).
https://voicecard.pics/
You could check out ethical ads [1]. I have no first-hand experience with them as a publisher. But they are fairly unobtrusive on readthedocs [2] sites.
2 comments
[ 8.8 ms ] story [ 17.9 ms ] thread[1] https://www.ethicalads.io/publishers/
[2] https://docs.readthedocs.io/en/stable/#