This is interesting ... searches on Twitter for the term 'Firefox' were pointing to a 'Promoted Tweet' featuring IE9. Did Microsoft purchase the 'Firefox' keyword on Twitter to promote its own browser or was it just a happy accident for Microsoft?
Here's the link (the IE9 'Promoted tweet' is no longer being displayed).
Sneaky tactic or clever tactic or just a happy accident that just happened to benefit Microsoft? Does it matter if a competitor does this? Does anyone even pay attention to 'Promoted Tweets'?
I've reached out to Microsoft for comment and will update the post if/when I receive a statement.