Muthead

Back to FYI - 500K Coin for 2K MC is still out there

Single thread,
coneyscombo

Finally popped for me after I put a bid in an auction. Did not lose auction at the time. Bid 20K on a QB with an 80K BIN. Had 26K or so coins total. When I closed the bid window, the offer popped. 

If I had to guess (and this isn't different from other theories) it's some combination of number of bids and/or total coins bid across all bids.