On the limited information available, I can't see what this offering is offering. Does the deal just allow you to buy 7 snack-credit dishes for the price of 6 -- and if so, who would want to purchase 7 snacks for 1 person? Is alcohol included? (I could, maybe, imagine someone wanting to munch on 3 of these snack/tapas sized dishes whilst sinking a couple of cocktails and hanging around for the 2nd ROL showing). If it is being pitched as a mini EPCOT food booth browse, then offering the deal as a couple's night out with 2 ROL preferred seats would make more sense.
This seems like it's theoretically a good deal if you were planning on seeing RoL and snacking all day anyways. AK does have some pretty good food outside the actual full serve restaurants. I also don't see anything preventing you from using the $30 for multiple people, and then having everyone else go to RoL standby.
It is common for Disney to offer discounts on dining during peak periods in order to spread out demand. For example at the Magic Kingdom they will often provide discounts for counter service meals if dining before or after a certain time. This is likely designed to take some demand off of animal kingdom’s counter service facilities.
I guess it beats the alternate headline of "Purchase food that would cost you $17 off property for only $30." - Or - "We're rollin' back prices all the way to September....provided you pre-pay us now" *