Well, I see one of the Devs (and/or Forum Moderator) already answered you, and Veseljko explained "who" Jiroc is. I just wanted to say that even if a Modder was asking for Patreon payment to join a server, I don't have an issue with that. There have been a couple of modders that I have downloaded a few different mods from and because I like their work, I have donated a small amount of money to them.