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This does not have to prevent them from getting the traffic they need, though.

The big challenge now is to pick from the most appropriate method of deal. I have noticed rates higher but can't say for sure if yet successful in selling a bunch of their available ad space.
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Keep them designed for your main topic, but do use them because The s do.
The good ad networks (and we mean the vast, vast majority) aren't doing anything with those permissions that components to worry about.