345 votesChris De Laet commented
How long do the credits stay valid?
If they stay indefinitely, you can simply pay $3, cancel your subscription, and use the 15 credits at your leisure.
I think the "occasional user" thing should probably be clarified on the pricing page, judging by the amount of comments regarding the subscription plan.
$3... you won't hear me complaining. Thanks for the great service, guys!