Bid deposits can be made through Lightning Network as well as on-chain Bitcoin transactions. On-chain Bitcoin transactions must confirm within the standard auction countdown to be valid.
Login to access unlimited bidding for the auction and all auctions in the sales event. Logged in bidders benefit from cumulative collateral requirements i.e. instead of depositing a fixed collateral percentage with every bid, they are only required to maintain the collateral percentage on their highest bid.
If the second place bidder placed a lower bid above the third place bidder i.e. they engaged in a head-to-head bidding war with the non-paying high bidder, they have the option to extend the auction countdown by 24 hours with their lowest bid above the third place bidder as the starting bid.