Some simply quits working if you don't buy it soon enough. Some Shareware gives you bonus features when you register which some people resent. They extend the term crippled to include Shareware that doesn't have all the author's bells and whistles. That's an extremist position. We think true bonuses coming with registration, such as adding extra functions to working software as QWKMail creator Mark Herring of SparkWare did, are a legitimate business gimmick.
Shareware IS business.
Getting people to pay is no easy task. Some Shareware authors have no head for business. We wonder how many people called to turn themselves in and claim the reward. Perhaps the most damaging thing in Shareware are the few authors who are unreliable or dishonest. We've seen examples of each.