Well, I don't think the losers should gain anything...they're lucky they don't lose DC. xP
The only time we give DC to losers is when we see a match like, 3-2, or something like that, other than that, I don't think it's needed.
You guys could always bet on DC, it's a little risky, but I think that's enough "flare" for you guys.
If you guys set up your own rules for your duels (as long as you guys agree with it), like you're not allowed to use certain cards for that match, then the duel will be legal and DC will be cashed in.
Make sure you state that though and have the opponent confirm.