Well they're not going to bust the owners of Amazon, or Paypal. Paypal is profiting from these sales, covering the transactions. If its something that's going to be prosecuted on the smaller levels, then there's going to be precedence set that Amazon and Paypal and Visa are part of this "conspiracy" to sell as they are handling the transactions and transporting the merchandise across state lines.
When they bust the mob, they don't let the financiers off with a warning. They are usually the ones they go after first. Any Mom and Pop shops targeted initially would have recourse if Paypal, Amazon and Visa are all given a pass.
So they'd have to either go RICO act on Amazon, Paypal, Visa, etc to uphold any judgement's against smaller businesses who can easily argue that they took their cues from big business.....or they'll simply have to allow businesses proper time for all businesses to sell their remaining stock prior to the ban, just like they're allowing Amazon, Paypal and Visa to do, at least a few weeks to clear out stock.
And yes, Amazon is responsible for the items they sell, especially when they're the ones providing the boxes and the shipping labels for the merchandise.
And rather than protesting the bill...if sellers want to do something about it, my recommendation would be filing a cause of action against the government over the ban. Sue the federal govt over loss of revenue, investment into merchandise that's suddenly made illegal, and see what happens. If a court finds in favor of the plaintiffs, which they do in some of these cases against the govt (and the govt is none too popular with the state courts right now) then the ban could be overturned by the govt themselves finding it too costly to bother defending. It would all depend on how many supplement companies got together, and how good of a slick schister lawyer(s) they can find to sign on and take the case on contingency.
Supplements are big business, and no one has made the case yet providing any solid research that PH's are any more dangerous than over the counter medications like Advil or Tylenol. In fact, the FDA just released a warning that taking simply a single "Extra strength" Tylenol can cause death. It can destroy your liver. Supposedly. (if you've got a weak one already I imagine) .
So in a civil court, you do not need "proof" to make the case that PH's are safe and the ban is causing loss to business. All you have to do is show a preponderance of the facts showing no hard evidence demonstrating any proven danger to PH's that make them any more harmful than already allowed over the counter medicines and supplements. Of course you dont' want to list them as medicines, just want to draw attention in court to the lack of evidence the govt would be able to produce linking any actual harm to them. They don't have this evidence, so they'd most likely lose in court. The damage, could be in the hundreds of millions in such an award, and the govt might decide to reverse the ban just to avoid the hassle.
Just a thought this morning, from a guy who misses his PH's already. Boy I wish I'd stocked up on Furuza.