The cheapest ec2 instance is around $15/mo The on-demand t2.micro is $0.013 per hour, so in a 31 day month, you would spend $9.69. The t1.micro is available a

The cheapest ec2 instance is around $15/mo The on-demand t2.micro is $0.013 per hour, so in a 31 day month, you would spend $9.69. The t1.micro is available as spot instances, and currently the price is $0.0061 per hour (fluctuates with demand), so if you were able to get it at that price for a whole month, you could pay $4.53. I doubt they are spinning up an instance for each trial, but let's say they are. If you get 100 free trials and it costs $500 to $1000, if you can get 10% to sign up for your cheapest plan ($19/mo) and the average customer stays with you for 3 years, you'd have $6840 of revenue after 3 years.