I started using Lemmy because, after a previous Reddit blackout a few years, the CEO of Reddit (Steve Huffman, AKA Spez) released a statement that (while I’ve long sense forgotten exactly what he said) made it seem like he was disappointed in the Reddit community for not supporting pedophilia. I used alternativeto.net to find Reddit alternatives and, because Lemmy wasn’t at the top of the list at the time, I used a few other websites before using Lemmy. At first I used both simultaneously but I deleted my Reddit account after the API changes.
It’s a good thing it is now. Back when I checked it, for some reason, most of the websites listed were nothing like Reddit/Lemmy.