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The delegation market on minnowbooster is to facilitate delegations. As we are currently interested to get more SP we have put a request on their market. Looks like this:
Screen Shot 2018-05-15 at 09.55.57.png

So anyone willing to delegate 500 SP could fill this order and get around 27% annual return on that investment.

Oh I see @danielsaori. Thank you very much for the explanation. Now I get it! 😁