Don't do it unless you have:
1. a large budget
2. patience
3. the intelligence to understand the data you are collecting
Other than that, have luck!!
To be able to understand the perspective. What signups Would You expect for Your own nich per 1 k traffic and What niche was that?
2.İf You send Your hits directly to Your landing page where Your links getting pointed to? i m thikin to point my links trhu join pages rather than tours, good idea or not?
3.Lastly, where Do you buy Your traffic from and what kind?
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