Not much help, I'm afraid, but was strangely reading an advert for them today- having never heard of them previously. I was intrigued so I'll be watching this thread with interest.
I bought 3 bags which lasted 300days to give it a go as other treatments had failed. It kept most of them at bay apart from a few which grew in size. They never fell off or decreased in size, so no I wouldn't recommend it.
I tried it, did nothing, also tried thuja and sarc ex which did get rid of a tiny one!
My boy had a large one on his sheath, which my vet said was going to need liverpool cream, so as a last resort I tried the toothpaste and after two weeks it fell off!