Just be sure, not to tease your audience ;-)
But joking aside, I do not really get what you are talking about. You can try first and pay later or not at all for those free pay what you want games. So it is actually in the best interest for the devs to give the players a satisfactory game experience.
Are you maybe talking about the very, very long release process, like vn being in the work for years and years to come, always teasing with small updates and letting players starve? While it might be annoying, just pay for what is there, if you are inclined to support the dev. And not for what is to come. There is always the sad risk that the dev will abandon or has to abandon the game. I saw some where this happened; the devs are in war country.