- Weather apps: various governments do the (very expensive) computing and provide the data for free. Private companies insert adds, or charge you. I use Yr, which is run by Norway and has no adds or fees. They are just sourcing public data [1].
- Taxes: the government does all the bookkeeping and enforcement, tax prep industry copies and pastes numbers into forms it lobbies to obfuscate.
[1]: https://hjelp.yr.no/hc/en-us/articles/360004008874-Weather-f...
Then our national weather institute launched their own app without tracking or ads, and the existing weather apps all immediately joined up to sue them over it. Thankfully they lost the case.
https://www.rechtspraak.nl/Organisatie-en-contact/Organisati...