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The $50 shown on the site is USD. Post earnings are 50% SBD and 50% SP. So at the current prices of STEEM and SBDs the 16.50 post earnings are worth about $50.

I seems to me that the upvote arrow should use 'sp$' as a symbol not just the $ sign then.

Yes, it absolutely should. Unfortunately the steemit.com frontend (as well as most others) operate under the assumption that 1 SBD = 1 USD. Now that that is not the case the values shown are confusing. I hope that they will consider changing that soon, but I'm doing the best I can to show things correctly on the bot tracker website.

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