There's no hint system/WT in chapter 15
There is in the patreon version.
I really do like celaviegroup's games and look forward to them, despite the lead dev being very clearly an insecure and resentful person, and despite the fact that the games have some pretty obtuse mechanics which result in progression becoming very difficult near the end of each chapter. I just personally feel like supporting a game like this on Patreon is a straight rip-off, given it takes over a year for you to finish a game (which is, in itself, not unreasonable considering how long the games are). Since you recently said you welcome constructive criticism, and you obviously read these posts, I'll say it here: I would buy your games if you sold a full version of them as a stand-alone product. I would be willing to pay, say, $30 for the FULL release of MBFD, including the walkthrough and hint system, as well as tech support if I run into any bugs (which unfortunately I always do when I load up your games, and is totally okay since you're obviously not a professional programmer).
I know you have a long-standing issue with this website because people steal your work, so here's my reason for doing it: I just cannot place any trust on early releases and promises of games on Patreon, considering that 99% of them never get even close to finished, and at least half of the devs there have no intentions of actually finishing their games. Harem Hotel, Mythic Manor, Champion of Realms, Corrupted Kingdoms, Waifu Academy, Lessons in Love, Secret Care Cafe, Lucky Paradox, Corrupted World, Lust Age, Breeders of the Nephelym, Public Sex Life H... all of these are games I follow here, just to name a few, and none of them will ever get finished. I'm willing to bet real money on that, because I know I'll win that bet an order of magnitude more often than I'll lose it. They are fantastic games, but because they are essentially unfinished products with no guarantee of being finished, they are not worth paying for. More famously, even Subverse, a game that was funded in the order of millions of dollars and is being developed by a well-established group in this genre, is either never going to be completed, or will be completed with less than half of the promised features. Because of this more than substantial history, older people (like myself) just will not place any credence on Patreon, Kickstarter, Steam Early Access, or any other of these types of platforms.
tl;dr: just sell your games, dude. People don't rip off your work because they're assholes, they rip off your work because they don't trust Patreon. Your games are good, even if they do have issues; most people complain just because you get mad about it, but you're obviously talented and your writing is better than most. Once you're about a third of the way done, release them as Early Access on Steam, do monthly updates until it's done, then raise the price by ten bucks. People will pay. It's better than constantly coming up with new ways to bypass the piracy that goes on in f95zone, which exists largely because Patreon is such a pile of bullshit.