It's more like an agreement, Brian.  Jeff sells his recipe, and asks that buyers respect his business by not giving it away.  I purchased it, and have no problem not posting it.  I don't sell any of my recipes, so I post them for everyone.  If my business was to sell recipes, I wouldn't want people giving them away, for free, either I guess.  I think it was $18.  It's quite good, but there are several on here that are just as good.  One thing he does, is send a bunch of extra material and updates to recipes, so it's kind of a "lifetime subscription" thing.