Amazon Data Pipeline and Cronally solve different problems.
ADP is a complex service designed to transport and process data between AWS products in a time-sensitive manner. Minimum intervals of 15 minutes and the inability to run jobs on a set of existing machines (i.e. running a shell command pipeline requires a separate instance launched for each execution) doesn't support a number of use-cases.
Cronally is a simple platform that augments an existing AWS cluster by allowing those same machines (or others) to perform work, while handling locks transparently and supporting resolution down to the minute.
We support JSON in the CLI so users can access the response data with tools like jq (http://stedolan.github.io/jq/), but leaving off the json parameter will respond with human readable output.
The pricing is regrettably not up yet, but we'll definitely work on some other examples.