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That's exactly right @lunaticpandora. :)

Upvoting comments is actually something else quite different than reward author's posts and original content from a curation point of view

1 minute or less may be enough to read entirely a comment and upvote it if is deserved. Though, while a comment even can be longer, juicier and tastier than a whole original post, the willing to reward them handsomely in signal of appreciation & recognition, mostly have anything to do with 'curation rewards'