I do not talk about money very often in my vids, because I get sick of some channels almost begging in every vid. When I do mention memberships I say it is just a nice way to support the channel - if they want. I should offer more to the members but I really dislike a paywall.
I mention my e-book every couple of months (every 8 or 10 videos). I rarely even mention the YT Memberships. I should talk about a little more, but I do not want to come across as an e-beggar. The only thing I really have to offer members is early access to my vids, as I try to have 4or 5 scheduled at a time. I just set them to 'members only' and have to remember to schedule them later.
I had both Patreon and YT memberships for a little while but the YT memberships were far more popular than Patreon, for my subscribers. They did not want to mess with another platform either. I eventually closed my Patreon. Patreon takes like 5% of the collected money. YouTube memberships take 30%. But I found Patreon too much like another platform and more work than I wanted to do. Also YT has a lot of built in stuff for members.