Splinterlands does take a sizeable investment in order to rank up. However renting cards for DEC right now is one of the easiest ways.
It used to be the opposite haha. Times have changed. a Single maxed level common card is not c.300-500$ ! And you need now c.30k USD minimum to have some good teamt to be in gold rank.
Crazy !
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It does but if it didn't there wouldn't be as much value in the game. Money has to be generated from somewhere.