Hate to be a naysayer since Puca was very awesome to me over the years but I finally zero'd out last month. Currently using Cardsphere and happy with it. Puca is still good if you're sending lots of bulk and are willing to set high promos but I think even that might not be viable indefinitely.
Don't know if you're still keeping tabs on it, but Medina took over. It's in a tough spot but we are teying to turn it around this year.
Promoted trades are pretty important for higher demand cards. Stooge offered some good advice on getting the most bang for your buck. Would you mind dropping your link so I can check out your want list?