Thankfully most of the makers are Chinese and they couldn't give a flying damn about the FDA.
And it would be a minor issue for the government to stop/seize shipments from China containing "contraband".
I don't think all of them are informing customers of the effects of the Deeming Regs, and they will be in for a nasty surprise.
I'd wager a good chunk of those B&M's don't even know about the deeming regulations, and will be in for an even nastier surprise when the government agents show up at their door.