Just to be clear: This service is offered by Amazon/AWS themselves, it isn't a third party. That's a question I had when I first clicked, which is why I am answering it here. One big "gotcha" for AWS newbies which I cannot tell if this addresses: Does this set or allow the user to set a cost ceiling? AWS have offered billing alerts since forever. They'll also occasionally refund unexpected expenses (one time thing).…
>For every Lightsail plan you use, we charge you the fixed hourly price, up to the maximum monthly plan cost.
Wording implies the monthly pricing is a 'maximum' price.