"xfstamps" sold an album page of US revenues as lot
263659121064 for $708.76 on 15 May 2018 to winning bidder "2***4" (23). Looking up the bid history shows the bidder as y***9 (23)
The under bidder was N***M (2013), showing up under bidder history as c***y (2013).

https://www.ebay.com/itm/-/263659121064 target _blank rel nofollow 263659121064 /a .jpg" border="0" style='cursor:default' onClick='doimage(this,event)'>
This lot included two distinctive and unique stamps – R282 serial # 563503, and R285 serial # 55249 (sadly, one of the butt ugliest and faulty R285s ever offered for sale).
Not surprisingly,
"bank-notes" lists these exact same two stamps ending on
ebay 5 July (R282 lot
263778950487 starting at $125 and R285 lot
263778951687 starting at $310).

https://www.ebay.com/itm/-/263778950487 target _blank rel nofollow 263778950487 /a .jpg" border="0" style='cursor:default' onClick='doimage(this,event)'>

https://www.ebay.com/itm/-/263778951687 target _blank rel nofollow 263778951687 /a .jpg" border="0" style='cursor:default' onClick='doimage(this,event)'>
The R282 ended at $159.50 with three bids (Eric Jackson winning the lot, the under bidders were N***M (2013) and m***w (553)). This is actually a very nice copy of this stamp.
The R285 had a single bid (The winning bidder was N***M (2013), showing up under bidder history as c***y (2013)).
Wish there was a way to see the full bidder names.
There is no doubt in my mind
ebay has to be aware. Any high school programming class could come up with an algorithm to spot this kind of stuff in a few hours or less if allowed internal to
ebay's bidder/seller data. Creating a link diagram would highlight the shill bidders without any doubt.
Will be interesting to see if R285 serial # 55249 shows back up on ebay anytime soon...as well as who is selling it, how much it is listed for, and who buys it. 
So xfstamps = 2***4/y***9 = bank-notes = og_stamps = blah blah blah