I am using a service called Invoicely for recurring invoices in my small business. One day I randomly googled for some of its features and found a post of a guy who claimed (and I believe him) that Invoicely is a blatant screen-by-screen clone of their own SaaS.

I felt really bad for that guy, and after some time I thought that it's a good idea to switch to them. The problem: their website name is so difficult to remember, I never got around to actually opening an account there.

Some shifty guys literally copied an existing service up to their Javascript and CSS, and improved it dramatically just by giving it a name I can remember.