Problems with packer instructions in README.md

I wanted to deploy the datasift-connector to EC2 and followed these instructions https://github.com/datasift/datasift-connector#quick-start---deployment-to-ec2 . I ran into a number of problems:

The quickstart fails to mention that https://downloads.chef.io/chef-dk/ must be installed (it's mentioned only later in the page)
When packer tried to create the l2.tiny instance to load the first ami I was getting "'A subnet ID or network interface ID is required to carry out the request." errors. I had to edit the datasift-connector/packer/ami.json file to set the instance type to m3.medium which can run in EC2 classic.
Once the ami was provisioned and packer started running I had to accept the license agreement https://aws.amazon.com/marketplace/ordering?productId=74e73035-3435-48d6-88e0-89cc02ad83ee&ref_=dtl_psb_continue&region=us-east-1 . There is no mention of that in the docs, and also I don't really know what the financial impact is? Am I paying extra for the ami used by packer during the build? For the ami that packer ends up building and that I will be running for a long time?
The image gets built in the us-east region. I had to manually copy it to the eu-region where my servers are running (and it took about 30 minutes).

Would it be possible for you to just publish the ami with the datasift-connector to EC2?

MeltwaterArchive / datasift-connector