Your selection seems to be Tennis @GothMoth, in the promotion I see that it's mentioned: "We have live streaming on top football leagues every single day"
Have you tried selecting a live football match on which live streaming is offered? I think that's the only type of selection on which the boost will appear.
@Ray-Unibet you needs to read a little further
We have live streaming on top football leagues every single day, meaning that you can Bet & Watch with Unibet TV. All you need to take advantage are funds in your account or to have placed a bet on the big game. That’s not all! We are offering a 25% live profit boost on our Unibet TV games of the week: