Take a working idea, find out why it's working, find out how to make it better, try it out. It doesn't make sense to only copy a working idea without understan

Take a working idea, find out why it's working, find out how to make it better, try it out. It doesn't make sense to only copy a working idea without understanding why it's working because your copy will be slightly worse. While you might have some success you won't take the big share. You must find a weakness in the original idea or the execution or the location or anything else. If you have a solid point where you can improve you have a chance. Don't be afraid of stealing ideas and making them better.