There's definitely some profit-taking going on right now with grafting. I think it will die down some, but there is some labor involved so I don't think we'll ever see $3.99 grafted plants.
I'm personally planning to graft a couple of plants onto Tasti-Lee VFFFNT and see if it leads to any improved productivity. Not sure where to get grafting clips without spending a bazillion dollars though. Is there an arts-and-crafts type product that comes close? Could I use plastic wrap and then a hair barrette or something? Guess I should use the Search feature.