They will do that up until their respective fans are still willing to pay for the tickets.
We all know that they may have even a prior arrangement before the fight.
So for bettors, I don't think it is worth to bet especially if it is your last money.
If you want to bet, just use your extra extra funds so no hard feelings if the judges will resort to draw decision.
Since this is an exhibition fight draw is likely to happen, In Mike Tyson's last fight against Roy Jones Jr. which is an exhibition match, Mike Tyson is clearly the winner of the fight with his aggressiveness but the judges made it a draw because it's a friendly match and it was stated that it is just to show the capability of both boxers at their age.
The same thing on the Mayweather - Jake Paul, Mayweather is very careful in not hurting his opponent, because there's no title on the line and the fight is not going o have effect on his fight record
Most likely to happen, it's just on how fans and bettors will appreciate both fighters' efforts. But likewise, draw may take place if that's how the promoters arrange things before it's even started. The very bad side of exhibition fight for those who still betting with this kind of fights, it can be manipulated, everyone around is part of the talks, even judges and ref, they know what to do.
Maybe hope and luck are still circling inside those bettors who will place their money in this fight. Who knows if there's some luck to come up and what they pick brings the win right?