If you really want to see episode 19 that badly, just spend the $10 for one month of a Patron membership. For the majority of people repeatedly asking when Episode 19 will be released for free, I imagine they spend far more than $10 in a month on stuff that wouldn't give them as much enjoyment as the last update would, let alone the entire game they already played for free. Although I'm no longer a patron, I did support them for around two years at the $10-$20 level a month. In hindsight, was it a good bit of money? Yeah. Did I get my money's worth though? Hell yeah. While I had issues with the game, I also went through a lot of tissues with the game, if you catch my drift. I generally enjoyed the various love interests, and stuff I did not like wasn't really enough to make me regret the investment I was making.
If the entire game wasn't worth even just $10 to you, you shouldn't be so upset that the last episode has not and may never be leaked for free. If it's gnawing a hole in you that you don't have closure and know how things end, then I'd say it's worth a bit of money to have that satisfied, not to mention that you're giving at least minimal support to the people that made the game.