Jokers are more useful as a get out of jail card if you get stuck somewhere with stratospheric fares home. I don’t remember the last time I used one tbh. They dissolve every year, and anyway with it being much more difficult to earn avios on flying the value of anything redemption related is moot.
Honestly, I’d spend the money buying revenue tickets, or earn GGL over a full year so as to pick and choose fares. Doing this during a relatively expensive period at short notice is really just a wallet emptying exercise. I’m all for doing things for the lolz, but this would fail my VFM filter.