Well, we're talking about the CA FTB here not the IRS (or at least that's what I'm talking about).
If your entity is based in Nevada and for example you only collect commissions from affiliate networks that aren't in California, the burden would be on the CA FTB to prove that you are "doing business" in California.
And while it's what's important when it comes to income taxes, just because you live in Cali doesn't mean anything when it comes to franchise taxes. You could be doing your work when outside of California, 99% of your business could theoretically be run by virtual assistants, etc. etc. They can't say you are "doing business" in CA just because you might happen to check your business email in California once a day.
And even more importantly, at the end of the day it would cost them more to even try to do so than they would collect even if they did prove it (in most cases)
(This all assumes you do things "properly" of course)