Use "On Demand" not "Reserved Instance". That means you only pay for the time that your server is up. My bill for last month was $4.55, but I also host my main website with them. I think the line item for the ec2 was something like $2.00. If you run games around the clock then it would be the $36 a month, but you would probably also have multiple GMs and be in violation of Fantasy Grounds EULA https://www.fantasygrounds.com/forum...sy_grounds_faq If you wanted to do something like that... ask Doug and negotiate with him how many copies or what special type of copy you would have to buy, it is not allowed under the current EULA so you would need further permission.
I have run 1 game so far this month (about 7 hours up time for a 4 hour game) and have a bill of $0.39 for my ec2 subtotal of this month. It can be expensive if you run a lot of games, but compared to my other expenses, it is still one of my smallest expenses each month.
In short it is like a faucet in your house. If you turn it off when it is not in use, no big deal. If you let it run all month you will have an awful water bill.
PS. Thank you so much for fixing my wrong number. I really should have looked it up instead of going off of memory.