I do think that you are overstating the addictive nature of the fortune card mechanic. If as they say, that there is going to be no advatage to creating a deck out of multiple packs before the game over buying one for the game then i have difficulty in comparing it to magic, WoW or gambling. In Magic there is a payoff in buying as many boosters as you can, both in the game result of aquiring rares and in the collector scavenger hunt thrill of getting a rare. In WoW there is a benefit of levels and gear of playing longer. Gambling will make payouts if you keep playing (not enough in general to allow you to break even but some payouts will occur)My major problem with the cards is a very specific one, actually, and not exactly this one. I'm not too worried about little Peter Moneybags having The Best Deck and leaving everyone in the dust (it's a distant concern, one that the information about the cards does much to dispel). The pleasure release isn't about the success, really. Compulsive gamblers like to win, sure, but it's not about the winning. It's about the playing. The chance element. That's the element that randomized card packs exploit. That's the thing that leads to "addictive" behavior. That's what doesn't add anything at the table. That's the predatory business practice. That was also my major issue with the minis.
If they simply dropped the randomized booster aspect of the cards, I pretty much have no problem with them (and in fact think they're a keen idea -- the TORG drama deck is plenty fun).
$4 or $5 or $3.45 (which is really seems like splitting hairs to me, but whatever) for a a booster pack may or may not reflect that pack's true value to you. A slot machine only costs $.50. Buying it is a gamble. And that's when it becomes kind of exploitative. And that's what makes it unwelcome for me.
Even if someone buys a booster per session, there is only so many sessions of D&D they play in a week and from what I understand in pretty short order they would have aquired all possible cards.
In the early days of magic I knew people who were spending pretty much of all their spare income after food, clothing and rent on cards.