Hey! I'm Mode's CEO. We host a database that contains all the data for tutorials. You can also upload CSVs to this database and do analysis to share with others, but the data and analysis are publicly visible. This is a feature we have had for awhile.

The paragraph below the one you cited says "The private function is available in two versions: (i) free of charge (with limited functionality) and (ii) as a premium paid Service (“Premium Service”)." This is the thing that's new today -- you can now work with private data for free.

Sorry for the confusion.