1) The person may be new - not knowing what they are doing yet. Since you can't search previous moves, a new player has no way to really search a game to "learn" how to play.
2) The person may be going on vacation - and making a big enough bid that it will hopefully keep him in the game until he gets back.
(kaŝi) Se interesas vin la progreso de turniro en kiu vi ludas, vi povas diskuti pri ĝi kun viaj kontrauŭloj en la forumo de la turniro. (HelenaTanein) (Montri ĉiujn konsilojn)