He gets away with it because no one has the balls to just arrest him.*
It's illegal to buy votes. It's illegal to offer anything of value in exchange for voting, not voting, registering to vote, or not registering to vote. It's illegal to offer employment in exchange for voting or not voting. It's illegal to offer entries in a lottery for voting or not voting. It's illegal to offer a lottery that isn't actually random.
It doesn't matter which way he tries to spin it, they're all illegal.
* A little bit of the hesitation could be blamed on the authorities not wanting to get attacked for being political (I'm sure Fox News would love to show footage of Elon getting arrested at a political rally). But lets be honest, the bigger issue is that he's the world's richest man, his defense would have limitless resources, and there's a good chance that the feds would interfere to get him out.
They spent an obscene amount, used horrible scare tactics, lied, slandered, and bribed people into voting for their pro-Trump shill and after all that, they lost in a blowout.
This was a must win, and Wisconsin came through for us. Not only will this help protect the rule of law in Wisconsin, but it could very well determine the outcome of both the mid terms and potentially even the next presidential election. Or at least, it likely prevented the other guy from letting the Republicans get away with blatant voter suppression and gerrymandering that they almost certainly would have reinstituted once they controlled the courts again.