In my opinion, professionals should remain professionals to the end. If a translation agency positions itself as a qualified professional, it has something to brag about. For example, go to website Darren Chastney company. They have a convenient home page that their potential clients will understand – there are services you can familiarize yourself with, testimonials from major clients, which says a lot, and of course contacts. Also, new services may appear on translation companies’ websites, and I doubt that they will call every client to inform them about it. That would take a long time.