As a Roblox developer, it is currently limited to monetize your game without buying a monthly subscription.
Awhile ago an announcement has been made saying that the higher marketplace fee for Non-premium has been lifted. Unified Marketplace Fee for Dev Products and Game Passes
Personally I find that nothing has changed. Some games are relying for game access for their monetization and some monetize greatly from VIP servers who has to spend money for the subscription.
If this issue is addressed, it would improve my development experience because it would greatly help with monetization.