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After I clicked the "start a bounty" link, in the drop down list, the 50 reputation option did not exist:

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marked as duplicate by hat, Robert Longson, Glorfindel, Nathan Tuggy, rene support Dec 21 '18 at 19:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Which question? – Glorfindel Dec 21 '18 at 13:55
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    @Glorfindel Oh, my bad. Just I'm referred the bounty help page and I found To avoid overly promotional bounties, if you are offering a bounty on a question that you have already posted an answer to, your minimum spend is 100 reputation (not 50). – Arulkumar Dec 21 '18 at 13:56

You either had 1) already bountied that question for 50 reputation before, or 2) you have posted an answer to that question already. In those cases, the minimum bounty is 100.

Note that in the second case, it doesn't matter if that answer is deleted or not; this is probably to prevent people from deleting the answer, posting a bounty, and then undeleting it.

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