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"Steem Power" and "Steem Power Delegation" are listed separately, implying that "Steem Power" is something other than delegation. If blocktrades are selling their own SP, that leaves the question of how the SP gets from their account to mine.

We are actually selling our Steem when we sell "Steem Power". If you choose "Steem Power" instead of "Steem" as the output coin, we send the Steem to you so that it it is auto-powered up instead of requiring you to manually power it up after. So buying Steem Power versus Steem from us is just a convenience thing, you're buying same thing either way at same price.

hi sir, why my delegation sp is reducing? i see you have done up to three times reduction with no clear notification. i have also sent this question to your email twice.but no reply. i just want the explanation sir. I am just a small fish looking for a bite of rice on this very social platform. i like you

That's really clever. Thanks for explaining!

Hello sir I need your help. . An account with this name @codenamesteve hacked into my account, I don't know how and collected all my steem and sbds I have struggled to get and was saving for a purpose, he recently transferred to blocktrades, I really need you to help me on this this guy seem to be someone familiar and seems I introduced him to steemit but I am having difficulties remembering his face.. Is there a way out on this cause I would love you to fight this injustice with me..

My guess was that they're using their own systems, not something generally available. I mean, they're blocktrades. Moving cryptomonies from place to place is what they do.