The average commission rate is $58 per the Shopify website. Shopify’s commissions are paid according to different metrics. For instance, if a referral signs up for the Shopify Plus enterprise plan (the highest tier), the payout is a flat $2,000. Referrals who sign up for the standard plan earn a $598 commission. The payout for a Basic account is $58. Commissions are calculated as follows: you will earn two times the monthly rate but only two months after the user has been a paying customer.
The online lead generation is a multi-billion dollar industry. Done right it can be far more profitable than many imagine. Everyone that I know that is in the business and knows what they are doing, for the most part, does 6-7 figures. While that's a huge range, much comes to one's ability to scale and effectively build / manage the infrastructure needed to scale.