Just paying 4 mana to copy the strongest token around (populate, if you will) is very good, and lots of cards and commanders can give you a token every turn, meaning that this class will draw you a bunch of cards even on your opponents turns
Phasing out an entire permanent type each upkeep can blank threats, protect your key pieces, and keep opponents from ever settling into a normal board
Most "roid" decks take advantage of only a few key "roid" monsters to adjust deck consistency, namely "Expressroid" and "Ambulanceroid." These monsters tend to be extremely vulnerable, so an opposing player should aim to prevent these monsters from having the chance to trigger their effects
What was Team ChannelFireball back then also showed up with their own build of Sultai Control
It's currently at $98.54 market value, but can go as low as $75