tons of people make new threads every day posting their picks. this guy happens to post winners so far since he's been here, just let him do that.
he probably makes a 3 or 5 unit play every once in awhile and it's easier to keep the units in tenths than hundredths. for example a 5 unit wager would be 2.5 if he halved it. if he loses he has to subtract 2.75, getting it into the hundredths. by having a standard unit of 2, he can bet 1.5 or 2.5x his normal amount without keeping track of hundredths.