"I would think it would cause some companies to give Facebook another look," said Gottheil. "Dumping Facebook right before their IPO. Well, that kind of public humiliation is rare. I just don't know what would make them do that... It looks good for Facebook that they're back."
And having the most popular mobile app can't hurt when trying to woo new, or old and disgruntled, advertisers into the fold.
Zeus Kerravala, an analyst with ZK Research, said if GM is going for a younger market, it makes sense for them to look to the world's biggest social network and to a mobile platform.
"Facebook could argue that if you want to appeal to the younger generation, they're the de facto standard now," he added. "Mobile makes sense as well since the younger generation tends to not use PCs a lot... I'm sure part of this is to try and make GM not look like the stodgy old company they haven been."
Sharon Gaudin covers the Internet and Web 2.0, emerging technologies, and desktop and laptop chips for Computerworld. Follow Sharon on Twitter at @sgaudin, on Google+ or subscribe to Sharon's RSS feed. Her email address is email@example.com.
Read more about social media in Computerworld's Social Media Topic Center.