Ebay is now penalizing, freezing, revoking accounts that drop ship. It is simply a matter of time before many of the other market spaces do the same.
What they are against, is the market space flipping, and not drop shipping when done correctly. So Selling an item on ebay, that you the seller buys on Amazon, and that item ships to the customer.. that is basically no more.
IF you have an actual drop ship business arrangement with a supplier E-bay will request proof of agreement and allow you to continue...
So The business model isn't dead.. its just being legitimized