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There's no way to compute this I think. For example, perhaps most importantly, the ultimate value of purchasing a steem delegation can be much more than the immediate return one gets from upvoting one's posts. This is because it makes it easier to gain attention initially and this can lead to long term profit long after the delegation has expired.

Ah, true, gaining more followers is another benefit, but I wish there was a way to predict all of those, after all we're spending the money for a profit.

You could try the MoonBot which is a subscription based upvote service. You can then spread out the curation over a month or so.

sounds more fair than other bots I saw, but I can only write four or five posts each month.

whatt is price??

you can get around 377,493.556 Delegated STEEM POWER (30 days) for each bitcoin