Games like the Tyrant are in high demand with little supply. It's almost a guaranteed $2000.00 a month, as long as you put in the effort to make great renders and program it correctly in Ren'py. But, if you're just doing it for the money, and you don't really like the game's theme, the players can usually sense that.
The only change I would make is to allow Harem players a chance to fuck the women, and prevent the antagonist from ever fucking them. To clarify, give the harem player a chance to keep the women all to himself, without ever being forced to share in anyway; this means the women are not being fucked by the antagonist in the start of the game. If a player likes NTR or cuckolding content, then they'll choose that path. But if someone likes Harem, make sure the women are untouched at the beginning, to give the Harem MC a chance to win over the women, and overcome the antagonist in a competitive scenario.