some simple reasons why they build these for you and still make money.
1. it is super mineaturized so that makes it easy to make.
2. the other companys are getting more than their product is worth.
3. they want to make it so a zapper is affordable for all, which is why they provide plans for free!
the $10 zapperplans.com zapper seems to be just as effective and safer than other zappers and there are many testimonials here on cure zone of people using it and plus
there are a few testimonials on their website itself.