How we balance 'Play & Earn'

in play to earn (p2e although we prefer play and earn) video games, developers must balance two user incentives at once the desire for fun with the desire to make money some players will engage for the fun of the game only, and thats great! others will play for the chance to acquire digital collectables and then sell them on the open market for real money thats great! we want different people to engage with the ecosystem in whatever way they are most comfortable the primary method we use to balance these two incentives is to make the "earn" part completely optional players can simply enjoy the game and have zero crypto/nft/digital collectable interactions if they do not want to