What could the possible benefit be for resigning many games after only a few moves? One of my opponents, who was rated 1400+ when our game started, jumped to 1900+ in a few weeks, is now back to just under 1700. I looked at his games and he's resigned a number of games at moves 1 2 or 3. That's odd to me.

The only think I can make of it is he is sandbagging. But how can that benefit one here? Most tourneys are open?