Why is it you upvote? Do you agree with what the author wrote? Did you read every word and thought about what's written?
We have to deal with CSI.. if you want to keep that high you can't if you always upvote the same great writers, those writing good content. I noticed if I do so even upvote 50 per day my CSI quickly drops. The only solution to get it up again is upvoting as many as possible for only a few %. I see people doing that even newbees. They have a CSI over 30 and give 0 of the 0 they have.
Is this supportive or is it more about own gain?

Wat if your SP is low.. <80 which is not desired by many communities (in the old days it was 70 and we see that same number still set in botsteem's settings if you set fanbases. Do you care about your SP or do you think: No way I want to give that upvote now? And if you decide not to, will you go back to support or forward that post to do so later?

If it comes to support there are many ways: commenting for example, tell the author you read and share your opnion/feeling/experience, forwarding the post so that author might be read by more Steemians, post the content on X, refer to it in your own article, we can indeed upvote and send steem, uvf, sbi or...

Are you using these options?