I expect alot of crazy people would start using alts in this freeroll or some people could probably not care about this because this is free and they just start going all in every single round.
It is not a secret anymore when it comes to a poker freeroll with a nice prizepool then some people will try to abuse it by creating alts in order to get a better winning chance. I hope sportsbet is able to minimize this kind of abuse, so all registrants are real player with single account only so the freeroll will be fun. I have experienced many times in freeroll but most players are sitting out which was not fun at all.