Minimum bounty is 50 or 100?

Question

It says in the FAQ that I can

Slice off anywhere from +50 to +500 of [my] own hard-earned reputation and attach it to any question as a bounty.

However, when I made my first bounty a few days ago, the minimum bounty I could slice off was 100, not 50. Why's that?

Answer 1

If you have already given an answer of your own to a question, the minimum bounty is 100. See:

How does the bounty system work?

for a full discussion.