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To be honest I didn't knew about Upvotebank. But it seems like their system operates as a bot only, while steemvotes.io is a website with an user dashboard. The rest seems pretty much the same :D
Edit: Now we're offering a full-scale upvote marketplace, where you can buy / sell your upvotes for Steem, which is way more than upvotebank offers.

You got a 48.48% upvote from @emperorofnaps courtesy of @discernente!

Want to promote your posts too? Send 0.05+ SBD or STEEM to @emperorofnaps to receive a share of a full upvote every 2.4 hours...Then go relax and take a nap!

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