I've been using Ultrabite for some months now. In that time, I've only blanked twice, but that proves little. Ultrabite, for those who don't know, works by spreading pheromones in the water, which are detected by the fish, and which encourage the fish to feed. The implication is that the fish will feed automatically, if they detect the ultrabite stimulant in the water. There is an Ultrabite site on the web, which is singularly UNinformative. I can't say that NOT using it makes much difference, as I've made no attempt to systematically record my catches. Ultrabite make many claims, but none of the 'evidence' they claim to publish on the web seems to be there - though I may well be mistaken about that. Perhaps they have a rep who will do the honours? All the same, it's now a regular ingredient in my method mix. I admit to being somewhat sceptical about Ultrabite's benefits, though I know one or two other highly reputable individuals, who use it on a regular basis for sea fishing, who insist it works extremely well for them. There are several related concoctions, by the way, for a range of species and fishing methods.
We can hardly be surprised at the company concerned targeting yet another product at a sector of the angling market famous for its generous distribution of its surplus income - can we?