UPVOTING CONTENTS:::: DOES IT COST SBD TO DO SO?

Great Day Steemians !!
Please the house should help to provide answer to these queries about UPVOTING!!

@alaisguineasis will appreciate as many that responds to this via comments.

1. Does it cost anything to upvote a content??

2. Can someone upvote as many times he desires daily??

3. Could there be any consequence(s) for abstaining to upvote??

4. Why do contents, especially of Minnow's always attract VERY FEW upvote and Comments??

5. How does upvote translate to VALUE ; who(what) originates the VALUE??

6. Any other Highlight on UPVOTING and Content Value??

PLEASE CAN WE SHARE OUR OPINION and EXPERIENCES for OTHER'S BENEFIT??