How far can you get by offering something for nothing? HubSpot itself appears to be an experiment in the extremes to which their approach can be taken. A visit to its site shows a company seemingly more interested in educating customers than selling to them, with most of the real estate given over to free trials, and ways to see and interact with the company's products. Their HubSpot Academy includes video tutorials and other free tools to get newbie inbound marketers up to speed.