I think i found the answer to why this one post made so much more. I checked the curators and found two of which have a users level of 64 and 68. Wether they are called dolphins or Whales, these are probably the ones with such a high steempower, that you made profit from their voting.
So to get money for the posts here you have to get either a really huge followership and/or attract some Whales' attention.