@GoofGoof said it best. Maybe ride warrior is a better term. Someone who does 20 or more attractions each day. Riding things multiple times.
Most do more than 3 attractions but I would bet the majority only use their 3 prebooks and probably do some 3-5 other attractions with short waits.
This all comes back to the point of this thread, that an option express pass wouldn't sell well as many wouldn't find $200 or more pass worth it as they wouldn't find the value as many wouldn't get enough attractions out of it.