Ultimately, as much as we might try, we sadly cant predict the future of MTG
For example: Pokemon ETB: Pokemon Center, Target, Walmart, GameStop, Amazon, Card Shop A Panini Prizm Hobby: Target, Walmart, Amazon, Steel City, Blowout Cards, Card Shop B MTG Collector Booster: Amazon, GameStop, Card Kingdom, Channel Fireball, Card Shop C Each row in your matrix is a product
On the other hand, Japanese booster boxes have more predictable yields
At the time, the company was still trying to figure out how to handle Universes Beyond
So you're not really ramping after all - your extra mana is all too fleeting, which is what makes this a red ability
All done