Nope! I just checked my control panel, and see that within the last 24 hours, I successfully rep'ed only 16 other members, yet I ran into the 24 hour limit wall. Now that can mean only 1 of 2 things: 1) Unsuccessful attempts to rep do indeed count towards our 50 rep per day (24 hour) limit; or 2) The daily rep limit is not 50 for all members.