The instance social.masto.host is indirectly funded by LineageOS + F-Droid.
Earlier, I was replacing my phone every 2 years with a new version of the same series. But last year, when my phone was ready for replacement (too slow, no Android updates), I flashed LineageOS + F-Droid on it instead.
I saved € 187.5 by not buying a new phone. This instance costs € 5 per month.
P.S. I know the exact cost because I bought one for a family member.
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