One Wise Man has said, "What is the use of reinventing the wheel, when it is already there?". It is true, sometimes.If you locate something - product or a service - which is a hot one and everybody wants it, there is no reason why you should not copy it. How many times have you thought that this is a good product, but still people don't buy it. You might have noticed some problems about it. May be it's location; may be it's service; may be it's presentation. Anything, which you think, if changed will bring in a great demand for the product.
Go ahead and copy it. Sometimes, you need to learn from the First mover. First mover may have done many mistakes, which you will be able to correct. Being in the system, you may not know what are the problems. This things happens with everyone. That is why, Kamath hotel management has a unique model of carrying out surprise audits from Guests. When some external party looks at your systems, they can pinpoint any deficiencies, any lacuna that your system has. This same lacuna can be taken advantage of while copying. If you are copying a hit product, there are chances that it will be more profitable.
In fact, I would go to the extent of saying that when you start up, don't go for innovation immediately. While successful innovation might bring in huge amount of success, the chances or the probabilities of successful innovation are quite low. Hence, I would suggest that you should go for a copy cat model at the start of your company or a business. Once, you have settled and there is a good cash flow, you can then think about the innovation model.