Linode just announced a $5/mo option with 1GB of memory.
This looks much better than the Digital Ocean version with 1/2 the memory.
And several blogs report that Linode has faster disks and cpu than the matching DO nodes. As a Linode user for many years, I was happy to hear that.
Someone should find out how large of a Discourse userbase you can support with the low-end Linode option.