Free credit incentives for pay-per-use accounts

X is rolling out free credit incentives for pay-per-use API accounts: a one-time $20 for saving your first eligible payment card, and a one-time match of your first successful auto-recharge, up to $50.

A new account that earns both receives $70 in free credits. They're applied automatically, appear in the Developer Console within about a minute, and are spent before purchased credits. They expire 3 months after they're granted.