It is possible that economy is not looking as rosy as last year and more discounts were given by sellers this year leading to more sales?

Also, I am not sure if a single analytics company report is worth it to generate discussion on this as the difference seems like error margin.

I agree. I hardly carry cash nowadays.

There is another website where you could practice practical side of crypto world : https://cryptopals.com/

Interesting, thank you for sharing.