You just answered your own question by admitting you can't "protect" your product from copycats. So just accept this and don't worry about it.
A copycat will always be a step behind. They can copy what they see on your site, but will never understand your thought process or customer learnings that inform your product decisions.
I have never (ever) seen a company fail due to copycats.
Focus on 1) Delivering an awesome experience to your customers and 2) Finding as many of them as you can; and you'll do fine.
Happy to discuss in further depth on a call.
