You can see how messy that sentence gets.
The whole thing gets a good write-up in the New York Times.
With the possible exception of Therapy?(?), these are all successful national or global brands. There's nothing wrong with a bit of punctuation (especially if it's an ampersand).
But they do present problems for writers.
For the moment, Aol. is continuing to write its name as AOL on its website. It'll be interesting to see whether this discrepancy lasts, or the Aol. usage gradually takes over.
They could end up in the same situation as Yahoo!, who always use the exclamation mark, no matter what the context. It's especially strange when it comes at the end of a sentence, as in: "What's the point of Yahoo!?" or "Please accept our sincere condolances, from all your colleagues here at Yahoo!"
Either way, if these brands think they're onto something with their punctuated logos, they ain't seen nothing yet. Over to you, Aalto University in Helsinki.
In your face, Yahoo!!