No, i didn't do that.
I collected maze keys just from SD,LD, and vagabond in duel world, not spent any duel orbs/ boosted duel orbs.
But i managed the maze keys wisely, so when i had i time, i farmed paradox with always got +8k DA. So i can got that points and rewards. Btw i have a job, i don't spent all the time playing DL. So don't be a retard by commenting & judging someone like that :)