DHT is autonomous and does not require a tracker. Usually it is only used as a fallback as a regular tracker is quicker. It’s p2p, and is split accross people hosting it.

I am doing 5-10$ rounds of donations (4-10 projects each generally) to my favourite projects too on a regular basis. I favor XMR transactions as is it largely accepted those days and fees are appropriate for such low amounts.

I use Gthumb for simple edits (croping, resizing, rotating…).

I use BTRFS for the same. Being able to check for and repair silent corruptions is a must (and this is without needing to read the whole drives, only the actual files). I’ve had a lot of them over the years, including (but not only) because of a cheap USB controller also.