I was Google searching for a product on the market that would allow JomSocial users to pay to become featured for a set duration of time. I came across this link "https://www.sourcecoast.com/blog/jomsocial-paid-groups-and-paid-featured-membership" which lead me to this site.
Reviewing your products, I don't see anything about this feature.
That's an old extension that we use to offer for Joomla 1.5 only. It was discontinued about 2 years ago and isn't available any longer.
Sorry for the inconvenience. I'd recommend looking at PayPlans which, I believe, offers the functionality you are looking for.
Sorry, but no. The product never got enough traction for us to continue development, and it became difficult to keep things as simple as we wanted.
I thought PayPlans had such functionality, but I guess I was wrong. I really don't have any other recommendations though. I wish you the best and hope you find what you're looking for.