"Playing overs"

[DrPublo]

I was at a really good 10-20 1/2 kill HOE game the other night, and someone at the table asked me if I wanted to "play overs." Never heard of this before. Apparently if a few people at the table want to play bigger stakes, they can enter into an agreement by which if it's only those few players left in the pot at any point, the stakes double to 20/40 (or 30/60 if it was killed).

I declined and I never even saw an "overs" pot happen between the 3 players interested.

My question is has anyone heard of "playing overs" before, and is there any potential advantage to it? FWIW, this game was very loose passive, often with 4 or 5 players to a flop for 2 or 3 bets each.

The Doc