I'm at the point where I am attempting to increase pricing. It's not a flat increase, but a model shift (flat to per user) where most of my current clients will end up paying more.
Do I grandfather my previous clients and only apply the new pricing model to new business? Or do I retroactively apply the model? Some clients signed up 2-3 weeks ago and I gave them no indication that I was increasing pricing.
Maybe send out a prelim email explaining changes in 3-4 months from now?