When Jean-Marie Messier was trying to make Vivendi an important Internet company, he decided he wanted to make some kind of portal (copying Yahoo) that would be named "Vivendi Plus". He announced it at a press conference before having even secured the vivendiplus.com domain. That was in Sept. '99. It failed miserably (didn't even launch).
Ten years later when Google wanted to copy Facebook they came up with the exact same name. It failed.
I think just naming a product myBigCompany--Plus is a symptom you don't know what you're doing or where you're going. It's bad form and then it's bad luck.
