It the business model of a great demo to get people to signup and reduce resources each release to make it lose less money. Rise and repeat.
Meanwhile the free version is trying to keep up with other vender so they are forced to give away more and the difference between the two versions (paid/free) after a period of time favours the free. version
Really? My experience is that it gets better every release (every few months to a year) and then gradually worse until the next release.