Sociazer does collect data point.

But it collects ONLY when you enter that specific saved favorite.
So if you are busy and have not looked at the favorite for a week, there will be no data for that week.
And if you have 20 favorites, you will need to check each of the 20.

Next, the Facebook favorites gives the error "Error! We could not get all the details about the page properly." 80% of the time.

Lastly, the graph it produces does not have the right math. Although the data points were captured from random days (depending on which day you checked the individual favorites), the data points are calculated as equal intervals. So the data with 1 day gap is presented the same as 1 week gap, giving you a false representation of the trending.

So in summary, Sociazer might save you time from "keeping" stats of the social media accounts you are interested in, but nothing more. It doesn't do real analysis and does not do automatic daily check (or even email you). I am giving it low score for its usefulness, its frequent errors and its false advertisement.