I said this a few times, the catch is upto $40.
You can find the rollover requirements from the withdrawal section along with the progress.

Is it worth trying? It is subjective but I wouldn't force myself to bet more to claim any bonus so I don't face a loss that I didn't intend to.
This might be worth trying, even though it may be difficult for us to get the rollover we expect. However, there is certainly something interesting we can take away when we receive the expected bonus, especially with a fairly large amount, as sometimes we are given even more than that.
For example, this week I received around 19 BCD as a bonus from an email I received. Although the rollover requirement is also higher, this can serve as a test for me to try out the games I want to play. On the other hand, the focus is more on enjoyment, so I maintain a positive mindset even if I lose all the bonuses I have, as the primary goal is for fun.

However, everyone may have different perspectives on such matters. For me personally, when it comes to whether something is worth trying or not, anything that involves potential benefits is worth giving a shot.