The problem seems to be, when people buy software in stores, they are not in the habit of paying more money for it. It is less confusing to the public if they can buy the game outright and not owe additional money to the author. However, this issue is still the subject of much controversy, and results will vary for different companies and different games. It is best to go into this kind of situation with your eyes open, and study the issues before allowing distribution of your shareware program on non-royalty shareware racks. The CD-ROM market is also controversial.
Authors report being pleased with the results.
This type of CD-ROM is less effective at generating registrations for the author because individual programs tend to get lost in the huge volume of software available. Also, the trilogy method doesn't work well when there are so many games available. Instead of registering to get episode 2 of Commander Keen, the user will simply start playing episode 1 of Duke Nukum, for example. License agreements are very important for shareware programs. When you release a program, it will stay released.