Credits never expire. A request typically uses 10 to 25 credits (1 credit = $0.001); a request that needs a clarifying question costs two rounds. $10 is roughly 400 to 1,000 requests. Paying switches your key from the free plan to credits right away. Secure checkout with PayPal (card or PayPal balance).
Questions or an existing AiHud account? hi@aihud.net