Thanks for all the answers. All the rankings came back yesterday with the same number. then this morning I had the sweet surprise of seeing very interesting upgrades. Considering the answer I had gotten from their support though I do not think it was a "normal" upgrade thing because the numbers were down for way too much time. But hey, if each time they have a problem I get such a nice jump in ranking they can mess up my script once a week LOL
There some users use alexa until now. In fact, I also use alexa even if it is not worthy. I use it just for monitoring only the estimated traffic but I did not rely on this. I also used other traffic monitoring tool.