If you introduce two people, it’s hard to comprehend the value you’ve created.
It might be nothing.
It might be a lifelong friendship, future work opportunities, an amazing new collaboration project, or simple more social capital.
If you have someone, perhaps you, perhaps a volunteer, ideally a group of volunteers who introduces members to people most like them (by occupation, by location, by common challenges) you will immediately increase the value of a community to that member.
Most communities don’t have more than 10 to 15 new people joining a day. This is an easy win.
Some groups, like The Community Roundtable, do a great job of this.
Most communities don't do it at all.