This could be the section where you thank your sponsors. If they offer deals to members, this would also be an excellent place to support that, as well as the section in the home page. To attract new members and signups, it would be great for them to see incentives and support from companies they know and trust.
If you have a sponsor “hirerchy” where some offer more then others, you could have multiple sections. For instance, if you have Platinum sponsors, a section for them, a section for gold.. and so on. Or you could have just a simple thank you page like this.
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