Mark when asked a while back about ALEXA, INT refused basically to comment on them, because, IMO of the Pay for rankings services that have been exposed on this BB. INT pointed out they use Google Analytics that are verified by a BANKABLE THIRD PARTY.
In layman's terms that means Google has verified whatever 100 million users quoted = that many distinctive internet addresses or emails. That's how many people have tried ORTSBO. Alexa can be ridiculously manipulated, just like the reads on this BB.