Unless I have the law wrong, he skirted the law. He didn't pay anyone to vote (although he originally said he was), he technically only paid them to sign a petition. The law afaik only says you can't pay people to vote (regardless of who, in Wisconsin you straight up cannot pay people to vote at all), you can pay them to sign a petition.
However I would argue that by first announcing that the money would go only to people who voted and then subtly changing it later is still totally a form of bribery. People absolutely voted for a chance at that money because of his original statement and didn't know it changed. But I'm going to go out on a limb here and say he'll be 100% fine because of technicalities (aka he's rich as shit and is completely untouchable)
I feel like at some point there will be so much banned that every government document is just going to be like caveman talk about how amazing petroleum and guns are