As convincing the idiot suits from above to not move us away from linux. One of the braindead ones from headquarters said "I don't think this can be a sustainable business model" talking about our use of linux on the boxen we send out to our customers. (Proprietary stuff developed out of the PLATO system, details upon request). My boss gave him the response "Seeing as we have had 30 percent annual growth for the last 4 years using this model, and have been profitable for the last 25 I'd say it is sustainable."
Suits just need to piss on something to get their smell on it so they can take credit later on for any success.
And no, the 25 years of profit is not a typo. It took us the first 5 years to get in and stay in the black. :-) We just may be the oldest application service provider in existence.