Make sure to actually understand how those “non-profit” websites and services are functioning.
It costs money to power servers and to maintain them. Most of the fediverse instances like to claim they are run on donations and so forth. But… think about how angry people get at the idea of tipping for ANYTHING and then wonder how many of those are throwing significant cash at your favorite lemmy or mastodon instance per month.
Everyone is always shocked when they find out how social media or a “free” vpn or whatever is funded and where there information is going. But hey, I am sure it will be completely different this time.
If you JUST want to read pirated ebooks? Kobo is probably the best bang for your buck. But you can also pretty easily sideload ebooks to any kindle via the email interface (which I believe Calibre can utilize).
That said? I have a mix of ebooks I got from legal and less than legal sources. And some of those legal sources include amazon kindle because the prices are REALLY good.
So I like my Onyx Boox. Yeah… it is jank as hell and it allegedly comes with a free 5g modem so be wary of what personal info you put on there. But it works well as I can use the kindle app (which also syncs with my phone) for amazon stuff and the native ereader for any epub files. And because I use a webdav to sync my notes, grabbing new books is as simple as remembering to
scp
a folder to my nextcloud periodically.