At long last the days of ImageLock are soon to be over. After careful consideration, we have decided to no longer offer, or support this feature as it has the potential to lower Google Page Scores.
ImageLock was a great idea in it's time, but the more we research the ability to lock images (prevent them from being used by others) the more we find that it has a negative impact on overall S.E.O.
For those who wish to keep it, we will not compel you to remove it from your system, however, any future upgrades will not include this feature.
