For all intents and purposes, drawing cards from an artifact's effect is the exact same as drawing cards from a green creature's effect, or a white enchantment's effect
Adding more cards works as a solution to stale Cube metagames by increasing the archetype variety
New sets release every few months, but the window to grab anything at retail is brutally short which is why timing, automation, and a solid technical setup are the difference between landing a box and refreshing an empty cart
In terms of sacrifice outlets , youre looking at playing Golgari Guildmage, Nantuko Husk, and Vish Kal, Blood Arbiter
I suck at math, but luckily Frank Karsten covered this very problem in an excellent article that I highly recommend reading
Mindsparker Maybe too narrow for Commander with its deck-size limits and lack of sideboard, this can still make opponents think twice about playing a ton of Brainstorm-type spells