Move over Dawn of Hope, paying for a beast from Trudge Garden is often better than drawing a card
For example, if you control a Treasure artifact token and choose the Myr token Brudiclad just created, your Treasure will become a copy of the Myr
Considering that Ob Nixilis is now three years old and has yet to be reprinted, the planeswalker could continue to rise assuming it sticks in Modern
Once you hit three poison counters on one or more opponents, you can put lands into play from your hand at the start of your end step, helping you ramp up in mana if you have any lingering lands in hand
When GameStop started doing it, it was without providing the staff with the necessary training and expertise, and naturally saw them paying woefully low prices, and of course without any of the individual stores having any independence over how it was carried out