The auction does use proxy bidding. You can read about the bidding here: https://www.usedpantyportal.com/howtobid.shtml
Like most all auction places, if the item starts at $1.00 you can bid $75.00. The system will place the dollar bid and if someone comes and bids two dollars, it will automatically bid for example $2.50 for you – up to your max bid.
If the item has a reserve of $40, starts at $1 and you bid $75, it will bid $40 for you to meet the reserve, and then proxy bid as normal up to $75.
If you are the only bidder, the item has no reserve, and starts at $1, you can bid $75, and if no one else bids, your winning bid is $1
If there are no other bidders and you bid $1, then $2, then $3, and so on, your high bid will be the winning bid. There wouldn’t be any sense in out bidding yourself like this unless you just wanted to be nice to the seller, which isn’t such a bad thing. 😉