I would love to be able to afford upvoting each time I comment (sometimes I 'talk' a lot! lol) - but I can't! I think it depends on the pattern one visits - I tend to visit 'friends'... people I follow - so I go to their pages instead of checking my feed (as there's just too much there to digest and also not everything I want to read/see) On a person's page, I normally visit more than one post - I usually upvote one, resteem the same or another, comment on more than one. That's why I can't afford to upvote all posts I comment on, but I at least upvote one of that person's posts. I feel less guilty that way too! :)