"Barely worth mentioning" because they don't even break out the $2 billion in quarterly revenue from non-advertising sources beyond "non-advertising sources" in financial reports, but in the most recent, the $400+ million increase in quarterly revenue in that category was primarily attributed to two sources -- increases in Play store revenue, and increases in "revenues from cloud and apps offerings for enterprise".

Its just hard for anything else to seem significant against the background of $18 billion in quarterly advertising revenue.