Maybe the new X Files movie can explain that... :)
But seriously, I've read the Yankees have been finding this old Energon stock too...
"Tonight's weather: Overcast with a 100% chance of ENERGON!!
My local Target had a bunch of Energon toys filling out their shelves tonight! I've only ever seen this at KB Toys before. Some combiner figs parts like Superion Maximus and Bruticus Maximus (only a couple of each, or I'd've bought the 4 parts for Bruticus I don't have), Steamhammer, Duststorm, etc. And a single Overcast, which I grabbed- yeah dog! New in box, sealed, the box is pretty rough but brand new, $20! Woo-Hoo!
Now I need Jetfire so they can combine and stuff."
Quoted from Hip-Hoptimus Rime from Tfans dated 23/7/08