There are additional costs associated with turning data into a usable format, getting data, time, collection- these costs are eliminated. From a hosting perspective, it can limit documents that need to be reviewed, and therefore limiting those costs.
Theoretically no. It is realistic for what is needed to transfer data through the web. Simply limited by bandwidth. The variables are simply what internet transfer can handle. The Venio engine is designed to get through data quickly- it can process a terabyte a day or more.