Are these stats only counting retail as purchases made by cryptocurrencies in person? Or do these also count transactions online from big brands (eg, buying a computer of newegg for BTC), or using purse.io to buy items of amazon?
I think these stats are pertaining to all bitcoin-related transactions as long as bitcoin is in the talk of the transaction or used as a medium for payment they are counted in. If you'll gonna tally a compiled transaction percentage of an asset in a country you need to consider all possible transactions that will include that asset so for sure it includes all.