Going to try and answer as many questions as possible.
Will VIP users be able to use their golden brooms in this championship, too?
No.
Getting money from another person's game is kind of un fair.
It isn't required, and if you don't pay and win the portion of money you win will go towards hosting for Zapkraft Servers.
I'll put cash up too once more info is released.
It all starts with a taster round, every player is pitted against each other in a free for all. Using the scores of players in that round the top 20 will carry on into the four groups. Based on how well you do (If you get into the 20) you will be categorised into the four groups. In those four groups there will be 5 players. Those groups will all be free for alls (Not teams). The two highest scored players of each group will continue into the next round where everyone is grouped back up into a 8 player free for all, which then takes the top four players into separate 1v1s where they compete for first, second, third and fourth.
All entry money is put towards the winning prize. First place will receive 50% of the total, second 30% and third 20%.