In the beginning of October this year Amazon announced per-second billing for EC2 instances. This potentially could be a big cost reduction for me. However Amazon also says this billing is platform dependent:
Per-second billing is not currently applicable to instances running Microsoft Windows or Linux distributions that have a separate hourly charge. Marketplace AMIs that do not have a separate hourly charge are eligible for per-second billing.
Does this new type of billing apply also to custom AMIs based on Amazon Linux? How can I check what kind of billing I have?