Hello, I own this local Facebook group related to the area where I live and it has 4k users, but it's constantly growing up. There are on average 5 post a day. Users post free ads of something they don't need anymore and they want to give away for free. I can filter what users post on the group. I thought to build a related site, build an article for each post and share all the posts of the group as links to my site. So people interested on that ad, can go to my site to read the full advertise. But once they go to my site, how to monetize it? Every idea is well accepted, Let your imagination run wild!