@mdgtpope I think he was asking if it's allowed as per the site's rules. I was going to say I don't see why not, as it's not much different from asking for Patreon subs or donations, but I can see the argument for rule 5.4.6:
5.4.6 No unsolicited advertisements of products or commercial services via the site in any way, including (but not limited to) group pages, title pages, user pages, comments, posts or private messages.
@Phelix this manga seems a bit polarising you'll have to read it for yourself to see where you stand, so far there has been no ntr if that's what you're concerned about.