Subscriptions, settled by the chain itself.

// AsentumPremium — recurring subscription contract.
// Customer deposits ASE → chain debits the merchant every period.

contract AsentumPremium {
  init({ merchant }) {
    storage.set('merchant', merchant);
    cron.schedule(this.address, 'chargeAll', '+1d');
  }

  subscribe(tier) {
    const cfg = tier === 'w'
      ? { amount: 3,  period: 604800 }     // 3 ASE / week
      : { amount: 10, period: 2592000 };   // 10 ASE / month
    storage.set('sub:' + msg.sender, {
      tier,
      amount: cfg.amount * 1e18,
      period: cfg.period,
      balance: msg.value,
      nextCharge: chain.timestamp + cfg.period,
    });
  }

  // Called by cron every day. The chain itself walks due jobs.
  chargeAll() {
    const merchant = storage.get('merchant');
    for (const [addr, s] of storage.entries('sub:')) {
      if (chain.timestamp >= s.nextCharge && s.balance >= s.amount) {
        s.balance -= s.amount;
        s.nextCharge += s.period;
        transfer(merchant, s.amount);
      }
    }
    cron.schedule(this.address, 'chargeAll', '+1d');
  }
}

This is the actual contract powering Premium on social.asentum.com. subscribe() takes the deposit; chargeAll() is fired daily by the chain's cron registry. No keeper, no Gelato, no Chainlink Automation.