They might be associated with Hasbro. I did just kind of assume after the Bumblebee movie ticket promotion (got to be honest I wasn't actually expecting to find any link to that). But I've also seen stores with the same kind of name for Marvel.

https://www.ebay.com.au/str/marveloutlet

and because I'm more interested in figuring this out than doing something productive, if you go 'where to buy' on Hasbro Australia's website you get linked to a Nerf outlet.
https://www.ebay.com.au/str/nerfoutletstore

On the other hand I can't get it to link to products that eBay page does sell. Or anywhere online. So it's a maybe.

Starscream not available anywhere

Starscream available anywhere, specifically that eBay page