Users are free to post wherever they want, but I am using certain criteria in order to best rate them at how useful they will be to a client. Users that post regularly in multiple sections hold more value to a company then users that only post in the altcoin section or whatnot.
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Let me clarify. What I meant by saying that is a bad idea is that if you disclose which sections you consider to be "more valuable," many members will end up spamming those sections. For instance, if you mention that you pay users who post in the "meta" section (just as an example) more, because it's perceived as the most valuable, everyone would then try to post there.

It's perfectly acceptable to hire members based on the sections they contribute to, depending on the project. For example, if the campaign is related to a "wallet," it would make sense to hire individuals who are active in that section, rather than those who are more engaged in the "mining" section.

In general, I believe campaigns shouldn't manipulate the natural behavior of members. Allow everyone to post where they feel most comfortable or where their contributions are most needed, and then select them without revealing the reasons why.

Just my 2 sats.