The feature creep, excellent bug to kill a concept

Two companies competed in getting visitors to use their search service. There was the Sweet Search company which had all the tools necessary to search things and there was the Right Answer company focused on providing the answer whatever it was.
The Johnson family desperately looking for the meaning of life, engaged in both search companies. With several hours spent on searching, their kids got bored and complained. Mr. Johnson had an idea and contacted Right Answer.
–          Is it possible to include a service for children while we do the search?
Right Answer thought for a while.
–          No, sir, that kind of service will not get you any closer to your answer, will it?
Mr Johnson felt annoyed about the sarcastic answer and immediately contacted Sweet Search.
–          A service for kids while the parents do the search? Not bad idea at all, Mr Johnson, Sweet Search answered.
–          Excellent! We will end our engagement in Right Answer and do all search at Sweet Search instead.

A while later the new service for kids was installed just next to the search service at Sweet Search. Several families switched their engagement from Right Answer to Sweet Search. The numbers went up and at Sweet Search there was celebration time all day long.
–          Maybe we should install a weather service as well? Someone suggested. I mean, it could be nice to see what the weather is like while you search, wouldn´t it?
–          Excellent idea, management said.
And so it was settled. A week later the new weather service was installed next to the kids service next to the search service in Sweet Search.

The day after, one of the employees at Sweet Search went to the management and said:
–          I wonder if it´s possible to install a service for the employees as well? You see, we all have a need to file different searches into categories and we have no where to put it.
Management thought for a while. What harm would a little service for the employees do? Probably nothing, he decided thinking about the excellent decision to install that first service for kids.
A week later the new category service for employees was installed next to the weather service next to the service for kids next to the search service.
Suddenly the numbers went down. There was a loss of 20 % in the client base only the last month. To counter the fall, Sweet Search installed an athletic search service designed especially for athlets next to the category service for employees, next to the weather service, next to the service for kids, next to the search service.
Now there was a loss of 50 %.

A local newspaper smelled headlines and started digging in it. Were people no longer interested in search services?
They went to see Right Answer and found out their numbers had raised by 40 % the last month.
The reporter at the newspaper got hold of Mr. Johnson.
–          Are you still engaged in Sweet Search? They asked him.
–          No, he said. We switched back to Right Answer a week ago.
–          But why? I thought you liked the service for kids offered by Sweet Search?
–          At first we did… but then we got lost in the search. There were so many different services that didn´t appeal to us. We didn’t see the forest for the trees so to speak.
Mr. Johnson approached the reporter and shook his head slowly before he continued:
–          You see, I don´t know what Sweet Search is offering anymore. Is it even possible to find things there? Or are things just left there?
–          Are you close to finding the meaning of life at Right Answer then?
–          You never know. At least, the search goes on! He said with a smile.

Recognize the scenarios from two familiar companies 2001?

These examples might be old but the fact still remains. Adding features for some visitors may harm the user experience for common visitors. The more you include unique features not supporting the main purpose for visiting your website or web service, the concept once so clear and obvious will transform into a container of content formerly known as the most powerful service on the web.