Hey Kate,
In my opinion, and for what I do now, I would count Isagenix as it's own income and business. I have created a completely different account for my business via my bank, so that I know how much I'm spending on “business” expenses, therefore, using that debit card and account for those things.
Isagenix is a different source of income, and not coming directly from your “focused” services, if that makes sense. For instance, I do online and 1-on-1 training, so whatever my income would be from those things, my main services, would be different from cycles or supplements bought through my Isagenix website.
Just my opinion. Anyone else have any thoughts?