That's true. I tried Instagram + CPA with the same hacking niche and it worked and I made good money with it. Then one day I thought it's not good I should not do this and left the method in 2016. Now, these days I was thinking to do it again because the audience doesn't need to pay anything to use the hack. You gonna install few apps that are it. I may be wrong if they pay for something and don't get the product. I think my hack gonna teach them nothing is free in this world.
There were dozens of thousands of threads posted to this forum.
If you search properly, you will find virtually everything related to business.
If they don't get whatever you've promised, you are a liar.
Those people will be taught a lesson to never complete a survey for something that seems unrealistic.
They will not be immune to being scammed and used ever again.
What you must understand is that the system presented is very weak in terms of marketing.
You are basically killing your marketing and you are simply selling the offer.
That doesn't make any sense since you will:
motivate the user only once in his liftime which will make you less than 10 cents per user,
you will use very targeted traffic to actually rip someone off,
you will waste your and their time,
you will learn nothing about branding and other stuff,
you will limit the area to grow.
So the number of cons to this "method" is quite high.
I understand those people are ready to do anything, but since they are ready to do anything, you can probably get their e-mail address.