RE: Promote Your eBook with KUF : Brand New System
From the feedback given to me personally by email from advertisers, I would say the following :
For free ebooks or KDP select promos it's fairly easy, advertisers have been very happy with their campaign and we have had many downloads and many repeat bookings.
For paid books, things are not so clear cut. Firstly there's all the general stuff like whether the book has mass appeal or if it's niche, how good the blub is and of course the cost. Secondly it's difficult to gauge because for a paid book, many people will download a sample rather than make a purchase on the spot, so actual sales can come much later. Again we have had a lot of repeat bookings, although more for mainstream genre books.
The reason the ads are priced a lot lower than many other sites charge for ads is so that authors can see it as a way of getting their name out there and also getting samples downloaded rather than an expectation to instantly sell loads of copies and get rich overnight.
For your particular book, I think it would be fine, but we do have people who have advertised things like "Herbal alopecia remedies for one-legged otters' and expected to become millionaires.
Barnacle Boy! We have to find those stolen Naggy Daddies!