The security blog of Opera browser has an interesting short write-up about a security breach that happened to them:
Earlier this week, we detected signs of an attack where access was gained to the Opera sync system. This attack was quickly blocked. Our investigations are ongoing, but we believe some data, including some of our sync users' passwords and account information, such as login names, may have been compromised.
[...] The total active number of users of Opera sync in the last month is 1.7 million, less than 0.5% of the total Opera user base of 350 million people.
(Score: 0) by Anonymous Coward on Monday August 29 2016, @02:10AM
I would assume to identify Sync as a feature/service of Opera and not the action (as in 'to sync'). Without the quotes, but with standard headline capitalization, it could easily be confused with "sync affected" (which would have a very different meaning).