It could be an option to remove annoying ads from a hypercasual game or something more complex like a battle pass system. Either way, subscriptions have some unique business benefits:

• Predictable income: subscriptions generate a steady income stream you can count on.
• Increased retention: subscribed users tend to be more engaged and visit the game more frequently.
• Loyal players: subscriptions help build a loyal user base, as they remove irritations like playtime limits and frequent ads.
• Subscriptions may become a staple in your monetization strategy when combined with in-game purchases and ads.