What I don't understand is the difference between 'Download all CSV data' in the free tier and 'Download CSV data' / 'Download raw data' in the paid member tier

What I don't understand is the difference between 'Download all CSV data' in the free tier and 'Download CSV data' / 'Download raw data' in the paid member tier. It seems that the free CSV data is likely an extract or digest of the raw data offered as a sample.