we all know that with the rollover requirements, usually, we don't see our funds anymore even we are at the half of achieving the rollover.
The wagering requirement on 4cryptobet is only 15x and, to be honest, it's very low compared to what you would see on other casinos (30x or more). So, it's achievable and you can complete it while you still in profit if you know how and what to play.
If they are going to start a signature campaign then it should last at least for a month before they can see some positive results. Otherwise, it's going to be a waste of time.