There are a lot of versions of Bug/Crab Juice out there...ProCure, Patzke, New Fish All, Gooch Juice, Etc...The ones with the most Salmon or fish oil are the best IMHO...
They all seem to help in my opinion...and as you can see from this video, it does attract crustaceans...but you still need some fresh juicy bloody bait to keep the critters in there...
https://youtu.be/fv1twUMTupw
We did have some bait with the "Fuel" on it in some nets to get some Crabs to eat for our lunch that day but we also sent down the one camera net with scent only to get proof that it attracts crustaceans....and it worked.
Berkley gave me some samples to try last year...so I guess they are also thinking about getting into the market too.
Be careful where you spray or apply the Bug Juice especially Gooch Juice as it can make for some real slippery and dangerous surfaces.