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Renting 15k power gives you 37.5 dec per day. Instead of dec you play with 3 accounts. In this way you give up 35k power that is about 90 dec per day. Why do you prefer chests instead rof renting?

I rent on all accounts, to clarify. I don't own that collection power.
I'm making an experience to see how profitable it is to "rent-to-earn" or not.
And the intention is to keep stacking all the reward cards for the long term.

Not sure I understand the question.