Since they aren't giving us any free crates and amount of crown gems you can get from twitch drops is minimal, the system is effective at giving players an added benefit to earn content locked behind pay crates.

However, in an game where players (mostly new players) are overwhelmed with content choices, it could lead to increased frustration. For example, players have to choose to do endeavors or spend their limited game time progressing through a questline / zone, doing pvp, doing group content, etc..