The way Seatfrog auctions work is that we are initially allocated several seats to offer as First Class upgrades. These will be awarded through bidding or to users who use the Buy Upgrade Now feature.
There are times when services can quickly become busier than expected and availability is reduced. This may prompt an auction to close early.
When this happens the auction summary will update to show 'All Seats Sold Out' or 'No Upgrades Available" depending on your device. This means that the initial allocation of seats is no longer available to Seatfrog.