.That's not up to the companies to adjust - that's up to you as the business owner to make an executive decision and increase your business's fees accordingly, if you think it would be beneficial. Unfortunately, that could come back to bite you considering the notary fee structure in CA - a $5/notarized signature increase when applied to a loan package could end up being very substantial - substantial enough that your clients decide they can't absorb that and they look elsewhere.
Remember too, you do get the SE exemption at $15/notarized signature when you file your taxes - so you will benefit there.
It's your call but it's your business. Good luck.