Nice to see again people interested in a tipster competition. and what competition, the best one, the first one!
But personally I am disagree to the option of placing betting worthless, just to cover competition needs.
because if you bet without real money, you will try to hit big multipliers, and playing with a risky profile.
I think is not good to see who is a really tipster, because with "fanta money" and without this type of restriction, there is also the possibility for some fraud. Ok there is a registration fee but everyone could buy more then 1 entries, and we know all in this forum how many clones there are
Of course, about publish the bets/leaderboard, we can track the bets with this topic or even another web sites.
Just my 2 cents

I hope to play again this great competition!
First, I would like to say that I'm really happy to see the managers of this competition are still working on this!
I will now leave my 2 cents as well. I understand what you are saying about "fanta money", but I don't really see a problem with it.
We had plenty of users that just aimed for big bets as well on the last competitions, and if it worked they would then make low odds bet, if not, they would just switch to another account. amine14madrid was a good example of that type of play and he managed to get top7 two times, and could have easily got there for a third time. A lot of other players did the same.
For me that is just a normal strategy that some guys use, and I'm ok with it. As for multiple accounts, yes they could be a problem, but they will sure add more money to the pot, so I guess I will be ok with that as well.
Since the goal here is to create something like poker tournaments, but then instead of playing poker, users will place tips (for me this is just like playing with chips in a tournament), why not create a tournament where re-buys are allowed?
There are so many cool things in poker tournaments (re-buys, addons, bounty tournaments, freezout tournaments, turbo tournaments, crazy 1 chip tournaments). I know it's a different concept than what we were used to, but it could be a really funny game. I really want to see what the managers can come out with this new championship.
EDIT: Also I think that the problem you mentioned, about "fanta money", wont really be a problem on "high roll" tournaments. I'm mean it's just like poker. I can go all in in a freeroll, but if I'm playing a tournament with a big buy in, I will take a different approach. So I don't really see a problem here.