I don't think certification is the right approach, I think it is too complex a solution, too costly in terms of effort required to police/manage it. It won't fix everything, there will still be vendors who don't seek certification for whatever reason, so there'll still be products out there that need fixing after you buy them. And Free stuff will still be a mess.

I think the simplest approach would be to draw up a really detailed set of guidelines based on some of the checklists that have been touched on in this thread and then to make those guidelines available to content creators. It would basically become a set of instructions on how to package a product.

Sure, there are vendors who will choose to stick with their !!!names and convoluted folder structures, but they wouldn't have bought into the certification process anyway.

The vast majority of vendors and freebie creators would welcome it, it's a heck of a lot easier to follow detailed guidelines/checklists than it is to invent your own system every time you do it and wonder if you got everything. At the moment everyone is making it up as they go along and the result is chaos. The end user probably can't tell a well-packaged product from a sloppy one anymore because the bad ones outnumber the good. Vendors have been getting away with sloppy work because customers often don't know any better.

Once Joe customer has a better idea of what constitutes a good product (via "The Guidelines") vendors will be under a bit more pressure to come up to standard, or risk bad reviews for sloppy work. A Pose should never ruin a facial expression or move the figure to a different place in the scene, but a lot of customers don't know that, they just get frustrated when it happens. If more customers demanded their money back (or a fix) when they encountered it you'd soon see vendors improving their standards and checking more thoroughly.