20% market share is significant enough for any new manufacturer. Provided their product doesn't lack in quality it will have the 20% disgruntled customers and g

20% market share is significant enough for any new manufacturer. Provided their product doesn't lack in quality it will have the 20% disgruntled customers and gain more as their product reputation increases. What you described could happen, if tractor market is a monopoly or if all manufacturers collude, which shouldn't be allowed to happen. American broadband situation is a good example when there is monopoly due to lack of choices. They can price whatever they want for broadband and treat you royally when you contact their customer service because you can't switch ISP. Like in the extreme case of price hike of a pill to $700, that is what happens if copyright law stays the way it is now. Current situation is not a win for customers or the general progress. There is a lot of room for improvement.