I have had that issue with some friends, but I have gotten a few friends in! To be honest it doesn't bother me if people do not want to join, it will be their loss in the future, so I'm more happy for those who do join!
I'll be promoting the platform through a few different mediums over the next few months, so hoping to get a lot of people in. By the way, I love your blog posts. I would really appreciate any feedback you have on any of my posts as I'm trying to improve their quality as much as possible!