They can't. Your shit blogspam is all over the internet. You've been using LLMs to advertise it everywhere. You've been using bots to post fake reviews online. You've been selling them on platforms that don't give a shit about customers and will never take returns. Either by being first or having more money, or time to blow into it, you can easily drown out any potential threats. The only way another product comes out on top is by doing the same things as you are.
Which is fun and all, but there's external consequences to this behavior. The internet is worse, product reviews are worse, and overall, you're destroying trust in society.
But sure, "agency".