umm.. This has nothing to do with more data. This is someone finding 2 random numbers that, when combined, come out to another random number.
Their claim is the same as this: "Temperatures rose 2% last year. I ate 1% more potatoes and 1% fewer salmon. Therefore, since 1%+1%=2%, adding the %more potatoes and % fewer salmon will predict the change in temperature"
The blog author is, in fact, using only 2 data points to predict a 3rd. He's not using more data, he's using basically no data.
I have no idea how you could reach that conclusion from the article. The data in question is not "two random numbers":
EF reported a 19.2% increase in paid clicks and 11.2%
increase in CPCs at Google Y-O-Y. Do the math (1.192*1.112
= 1.325), that's a 32.5% Y-O-Y revenue increase. That's
the closest anyone got to the real numbers!
Their claim is the same as this: "Temperatures rose 2% last year. I ate 1% more potatoes and 1% fewer salmon. Therefore, since 1%+1%=2%, adding the %more potatoes and % fewer salmon will predict the change in temperature"
The blog author is, in fact, using only 2 data points to predict a 3rd. He's not using more data, he's using basically no data.