I did it for the promo card. I missed out on Dr Blight and so I wanted to be in the first 500,000 to have a chance at the promo card. Waiting on chaos packs is what I did and I don't regret that. Chaos packs are around $1.77 today, and the same thing may happen to Riftwatchers. I will probably open and sell some of the cards quickly to recoup my investment and hopefully have a few good cards to hold onto.