[RobertRoberts]

Negotiations and communication can help resolve these kinds of problems. (in my experience)

The core motivator to start the discussion can be simply profit margin. I've hit points where it's not profitable, and therefore gets cut from our offerings. But if someone wants to pay extra, we can accommodate.

Is it possible that by changing the requirements/costs of the product you would lose the account/business?

The way I started this discussion is with the phrase "web standards", and these are cheaper to build towards. So "non-standard" systems cost extra to support now. But this also meant I could lower my costs on some other work, so it wasn't smoke and mirrors, it was legitimately easier and less time consuming. (also, makes everyone happier to work on standards instead of spending most of our time with hacks and debugging because reasons)