Then might I suggest you make the next time have a cost.
Charging for the ending is absolute bullshit in my opinion. I feel it is just wrong. Honestly I get you need compensation but forcing people to pay like this at the end is just wrong it so many ways. I suddenly feels like a scam to me. I realize this may not be the case but that is how it feels when you only force payment at the ending.
No matter how good of a creator you are this move of pay for the ending just turned me off. I loved the game but I will NOT be forced to pay for the end when the rest is free. I am insulted you would try something like this and I will avoid anything with your name on it after this.