Was in a mood earlier but then I played Melee and was okay lol.
Edit: Okay, people are gonna keep pushing in tournament because placing well and not getting laughed at/ranked high/having bragging rights/etc are also important decisions when you enter a tournament. People are all going to enter regardless of payout(because of you're in contention for the top 5 spot, usually you can be up for the top 3 spot as well due to bracket shenanigans at the very least), so motivation for money shouldn't really come into play unless it's a larger tournament.
Also, who is going to enter a tournament and then give up partway through because the payout system isn't what they wanted? If you really think money motivates people so much then I'd say any extra money from venue fee should go in the pot for more motivation, but with everything else people play for(see above) that doesn't really do anything besides add a little hype maybe.
Double edit: Maaaaaaan no Brawl teams. Gay