Well... what happens is, like every niche there are things that are assumed to be known, you know, like unofficial rules of etiquette, it is something that is so intrinsic to freebets that it is the players who should know it, in the equivalence it is like asking what the yellow color at a traffic light means, for many it means I have to speed up, please! the reality is that it means you should start stopping...

Man, I know how you feel, it happens to all of us the first time, and I can tell you that coinroyale allows you to bet on "@" less than 1.5, there are casinos that put minimum conditions for the probabilities, the most common @1.5, then, you learn that it is preferable to bet on a multiple bet, if it is the case and the freebet allows it, that is, each casino has its restrictions on how you make the bet, for example Coinroyale in this case, you could have it in less than @1.5, but what they all agree on is that there is no return of free stake.

Ah!, and worth adding, congratulations for winning a freebet.