YES! I believe you should be able to upvote yourself however it should be limited to once MAYBE twice a day while the rest is used elsewhere. You invested time, money and resources and made the decision to power up your hive so you get to do with it what you want. Upvoting your own quality work is a great way to give it a little kick and get it noticed.
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I also agree with you. You can upvote 10 times with 100% voting power. If I upvote one to myself and 9 to others would be ok I think.