I invited a Swedish guy I met on the train. We spoke for about two hours about crypto and I am pretty sure he joined. I didn't know him well enough to actually sign him up though.
There are about 30 people here I invited with most being inactive now but, a couple still going strong, a couple sporadically posting.
What stops me is it takes a lot of work to onboard well and mostly it will be "wasted" as few will stay. There aren't many I know in my close circle who are the type of person to put effort into something like steem.
My goal for onboarding is a longer term position to bring in many at the same time rather than one at a time, hopefully with some investment and skills behind them.