No Trofo, you seem to be wrong actually. If you look at the first betslip of buwaytress on Sportsbet, for example, you will still see the result of the bet(lost here). So I think it should be mandatory for every sportsbooks offering this feature in order to allow other contestants to check the validity of the bets and to avoid fake ones.
Damn, you are right. Maybe they changed that later or maybe I got it wrong from beginning. No matter, from now on I will be posting my betslip link as well.