If you are a player with huge bankroll to play Spinomenal games with a minimum bet of 0.5EUR per spin then yes you have a good chance to win something.
AFAIK it is a global promotion so the number of participants will be huge as it covers all players all around the world on all sites that provides Spinomenal.
It is a fairly large bet, well at least for me, the platform has players who have enough money, in my personal case I make bets with little money and Bitcasino has a good chance of winning, I do not doubt it, but it would be good if they could lower a little prices to enter the tournaments, is it possible? they may win more players if they do so.
As I said previously, it is a global promotion from Spinomenal so the one who decide the requirement is Spinomenal (not Bitcasino).
With this 0.5EUR min bet, there are still so many players participate in the tournament.
I do believe there will be still many players participate if the min bet is higher than 0.5EUR since it is global promotion where there are so many players with good bankroll out there.