No it's the same system. Blind bid uses the lowest increment possible to save money for the offline bidder. However, if there's 2 blind bid, then you can imagine it this way:
Say blind bid A bids 10m
Say blind bid B bids 11m
Lowest increment is 1m, and it starts at 5m
A bids 6m (lowest increase)
B immediately bids 7m by how blind bid operates: boosting it by 1m since that's the lowest increase.
A jumps to 8.
B jumps to 9.
A jumps to 10.
B jumps to 11, and A stops.
When the auction starts, the starting price is already at 11m because of blind bid going at it against each other before it even starts.
When there's 2 blind bid, then before the auction starts, the blind bid already bid against each other at lowest increment, pushing the "starting price" at the time of the auction to a much higher number. This happened before in old auction where items may start off at extremely high number: that's because there's more than 1 blind bid.
