Readeck also has a KOReader integration via OPDS catalogue

From what I’ve seen recently one of the things it did was use a fake email function they gave it to try to whistleblow to a government agency about issues with some medical testing or something

Yeah, it would be insane not to buy a Tesla self-driving taxi, they pay for themselves

Nowadays I see them mostly used by creators for sponsor or product links, probably because it lets them track how many people click on it and when