Do you use Firefox, by chance? If you do, I could really use the Firebug output to the ad causing the issue (of the four it's not likely to be AT&T or Amazon, the other two are sketchy.)
I'm going to power load the ads themselves hoping to get the same one so I can get the info myself, but if it's geo-targeted or hooked on a cookie you have but I don't then I may not get it.
-edit-
100 loads at all four positions for one of the Blue Apron pages hasn't produced it yet. Going to stick it on a 1 minute timer overnight and see if I can produce it that way.
IF you have Firebug and are able to reproduce the pop, PM me and I'll send you my email address so you can attach the code. Once I have the code, I can have it nuked -- which is the case with any of these issues, and why I've had such a hell of a time with the damn Honda ad which has plagued
@cincibuck .