It certainly seemed so, and now a study confirms it:
As email clients get better at detecting and filtering spam, spammers are moving to social networks, where they have better chances of going undetected. That’s why, on a typical social media account, spam has risen 355% in the first half of 2013, according to a new study.
Spam is spreading on social networks so much that 1 in 200 social media posts is spam, and 5% of all social media apps are spammy (meaning they promise a potentially useful service and then send spam updates instead). These are some of the numbers revealed by Nexgate’s State of Social Media Spam Report [pdf], which was released last week.
About one in every 60 or so items dropped into my Twitter Mentions turns out to be spam. Sometimes I report them; about half the time, Twitter responds to the effect that the user no longer exists, which means that someone else has filed a report already. And I see one or two spams a week on Facebook fan pages, only a few of which I actually read.