http://official-gomk.anonblogd4pcarck2ff6qlseyawjljaatp6wjq6rqpet2wfuoom42kyd.onion/p/if-you-re-not-paying-for-the-product-you-are-the-product
If they're just like everyone else and they collect data to make money off users, then there's a real concern. Even more so if it's a clearnet website, as clearnet hosting providers are held to higher standards than darknet ones (because they are often NOT anonymous). So, in most cases, the aforementioned adage is true.