From my point of view if people wants to vote my contest is fine, they gate curator rewards too, it means it interests them and that's why you have voting power that refills. If they resteem the post i'm grateful. Actually asking for an upvote goes against steemit rules so you shouldn't ask for votes to participate. Anyway I feel this rule makes no sense because you are doing nothing wrong asking for a vote to join your game...it's like paying an entrance for a show or playing a slit machine, you play for playing it. Btw, I included one of your hashtags in the last question :)