Okay, this is quite a bit easier to understand than the Infinity Matching Bonus (IMB). Here is how the Infinity Sales Bonus (ISB) works...
Your ISB pays you a one-time bonus for every Personally Sponsored Affiliate (PSA). This bonus is tiered based off of how many PSAs you have. Your 3rd, 4th and 5th PSA pay you $70 each. Your 6th and on (for infinity) pay you $80 every time you personally sign up an Affiliate.
Here's where it gets to be a little bit more complex:
For every person (starting with your 3rd PSA) you sponsor, the first 2 affiliates your PSA signs up pays you the ISB. For simplicity purposes, let's assume you have personally sponsored 6 affiliates. The first 2 affiliates that your PSA sponsors (not that you sponsored), you get paid $80 each. This continues with the first 2 affiliates each of them personally sponsor. This goes on for infinity. For each first 2 affiliates that each 2 affiliates sponsor, you get paid $80 and so on and so on.
Just as important as it was for you to go get 2 go-getters for your first 2 PSAs, the ISB incentive is for you to go out and be a go-getter. There IS NO complacency when you decide to become an affiliate.