I think you are right Don. As you've noticed, many of their decks are sold out (series 1800s, tally-ho viper circle back, white-pipped black tiger...) I think now they are trying to get more buyers for their DVDs, which they produce a huge amount of at a low price, rather than only collectors buying their cards.
The Circle backs and Tiger white pips are out of stock simply because they've been discontinued, and the 1800's are out of stock because we didn't anticipate them to turn into such a popular Valentines gift (no, seriously). With the Artifice in two colors, the Arcanes, the Black tigers, Ghosts and Black Ghosts, three Masters, Tally-Ho Fan backs, Infinity and whichever ones I might've forgotten, I wouldn't say many of our decks are sold out right now.
In fact, the only deck in production we're out of stock on is the 1800's and we're expecting the red to be back in stock within a week or two.
As for the "huge amount at a low price" - that doesn't really take into consideration the costs for royalty, graphics, the actual production and post production etc. Not to mention all the Mountain Dew and pizza.