The more players who draw two cards in a turn, the more cards get exiled and put into the chaos pool that people can cast spells from
Common Most commons are bulk, but some can be valuable if they are old, highly playable, scarce, or from a desirable foil printing
TCGIndex doesn't give financial advice, but here's the data worth knowing: it sits around $0.10, down -5.3% over the last 30 days, with low volatility
A good rule of thumb is that the more resources your opponent has, the less drawing a card helps them, so if you are behind on cards this is likely worth activating
Altogether, Deathrite Shaman simply offered too much for any deck to pass up, eventually leading to its banning in both Modern and Legacy.
Its peak Manalith power creep, and Im happy to have it (as are my many multicolor decks!)