The best way to learn about Flatly and check to see if it is a fit for your business requirements is to start a 14 day free trial.

A free trial of Flatly gives you the ability to flatten up to 1 Billion cells in a single job run, and run a recurring job as frequently as 6 Hourly.

During your free trial only the first 100 rows are uploaded to your Data Destination.

Your cell count is calculated prior to upload, to help you understand which plan you will need to accommodate your data volume.

If you find yourself searching for "only the last" or "it's only showing the last 30 days" then more of your data may be available once you upgrade, in rows 101 and beyond.

Turn on Attach Metadata in your job's advanced settings and run the job. Then inspect the Rows count in your metadata attachment.