None of the strippers I've helped with or talked about taxes with pay taxes. Most of them don't even really realize that people pay taxes, they only understand that once a year they go to some little shop to do their taxes and walk out with money. They don't understand that the tax prep guy is making up income numbers for them that align with them getting a tax credit, then charging them for tax prep, giving them an advance on their return and charging them the bulk of their credit for that privilege. They think that's what everyone does, because they understand that come tax time they see a bunch of customers spending their tax refunds.
The reality that normal people have paychecks and their employer sends the government part of their salary to cover the taxes they'll owe is a complete mystery to them. I never talked to any of them about the no taxes on tips policy, but that actually might make for a funny convo.
As far as what constitutes a tip vs income for a stripper, I'd say money at the rail is clearly a tip. I mean, I've always called the damn thing a tip rail so that one seams pretty easy. The same applies to extra money after dances. Of the common scenario around here the $25 paid for a dance would be income, the $5 house cut would be an expense, and any payment above that would be a tip.
Where it gets less clear is for rooms for what you may be referring to as VIP. Those typically don't have fixed prices, but I personally think of the amount we agreed on as a payment so I'd consider it income for her. But quite often a dancers performance is exemplary and I give her an additional payment which I'd consider a tip.
But, as I started out saying and as RonJox pointed out, it's probably moot. I think the percentage of strippers accurately representing their tips to the IRS is rather small, likely well under 10%. And I think the policy is very unlikely to become reality.