I'd like to know what the number of users that directly used Pushbullet in the last day (or week, or month) over the number of users that have the Android app installed is. If they have it installed, everything they copy to the clipboard on Android is being sent to their servers, is it not? That puts them in the same category as Yahoo! Toolbar for me.

At one time Yahoo! Toolbar was useful for a significant percentage of its users, because it would let them know how many email messages they have, as well as give them convenient access to the news and weather - so I disagree that it did nothing for its users.

Edit: I took a look at https://blog.pushbullet.com/2014/08/20/introducing-universal... - it appears it was doing that at one time, but currently it may only be doing that for premium users, who would conceivably be likely enough to get good use the feature that it would justify the potential security risk.