OpenTV is free. There are no ads, no tracking on anyone who skips the community, and no watch-history table on the server to sell even if I wanted one. It is one person's work.
The best way to support it is OpenTV Plus, inside the app. It pays the servers, the store fees and the metadata bills, and it is what keeps the tracker free for everyone who never pays a thing.
Star the repositories: the app and the server. Leave a review on the App Store or Google Play. Tell someone who lost their TV Time history that their export can still be read. Report a bug in r/OpenTvApp — the last three fixes came from strangers who did exactly that.
People have offered, and there is no way to accept yet. I am in Iraq, where Stripe, PayPal and GitHub Sponsors payouts are all unavailable, so every donation service ends at the same wall. If that changes, this page is where it will appear.
Until then, Plus and the four things above are the whole list — and honestly, a review and a bug report are worth more to this project right now than a coffee would be.