Yesterday i got a mail from one of my competitors that they want us to remove the texts we have used from their website or they will report it to DCMA. Earlier i spinned the content very neatly and also added contents from other websites.The content in my website is 100%unique(copyscrape,smallseotools,grammerly and so on). There is no match to the website Still he way of writing so how matches,they may have guessed and so they are threatening. So my question is,Is 100%unique spinned content can still face copywriting issue? what should i do?should i avoid their email or should i change the content.Changing the content will have vast impact on my website NOTE : Its an ecommerce website in a small niche.