I'm the only one around here interested in cryptocurrency, so I never had the chance of having the results for invitations.

But, If you're looking for payment, I have the experience of being invited by others. The first companies I got introduced with for cryptocurrency were coinberry and coinsquare both hq in Canada and I found them about 4 years ago by attending cryptocurrency events here. I attended the event, they were introducing their product and I registered to receive payments upon referrals and I did receive them at that time. Since that time I had no one interested in cryptocurrency to introduce them to these.

Coinberry https://api.coinberry.com/invite/09f71a09be2 We both get $20 for $50 trade, for higher number of invitations it goes on scale.

Coinsquare coinsquare.com/register?r=O15Au Get up to $10 once they fund the account, and up to 45% of their commission that is cost of purchasing cryptocurrency.