Lets see, there are 3 participants already and there are still 3+ days before the first match start.
Frankly, I doubt that there will be more than 20 participants.
One more participant is joined to 4 and it is still far from the minimum of participants.
Freebet prizes do not change for 1-40 participants with different specifications, if for this paid round the minimum participant is 50, if this paid round still run then there will be 10 users who will not win the free bet.
As Panjul mentioned, there will never be 50 participants or even 20 participants. With the free predictor, the amount that participated was already low (20 - 30 people), so now with a small entry fee, even less people will be interested. I hope that they change this again.
It would be better not to ask for money to participate in such promotions. That's what promotions are for. Many people actually get interested in the platform and play when they are offered a free promotion.
Maybe they'll change it. I also don't rule out that they will do another promotion in between on the forum now that the European Championships have started, and the Olympics are coming too.
There are also nice promotions to link to.