Does this set or allow the user to set a cost ceiling? Probably not. Just based on transfer (network) costs, Amazon Lightsail includes this caveat: Some types

Does this set or allow the user to set a cost ceiling? Probably not. Just based on transfer (network) costs, Amazon Lightsail includes this caveat: Some types of data transfer in excess of data transfer included in your plan is subject to overage charges. Please see the FAQ for details.