Amimoto has previous generation instances, and also newer ones. We encourage the usage of the latest generation instances for best performance, but we still support previous generation Amimoto instances.
Choose the instance size depending on your purpose. For example, a corporate site with 100,000 PV monthly can perform well on a t2.micro.
If you have a new AWS account, you are entitled to a 1-year free trial of Amimoto t2.micro instance with 750 hours usage/month.
Check our post on How to Start Instance Selection (and Optimal Sizing) for more details.