QuickBooks Online Deal

This deal gives you 30% off 6 months, or you can go directly and get 50% off 3 months. That said, if you're planning on using QBO for 6+ months, then 30% off 6 months gives you a ~20% larger discount over the course of the first 6 months.

There is none. It's the magic of how affiliate partnerships work (well... sometimes).