I don't think he got paid by posting this review, his username doesn't get mentioned by the campaign manager, you can correct me if I'm wrong.

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I can't find the original source of his post, but it doesn't mean he originally created the post because the post indeed looks like an AI text generator. I think this is the first time for me someone review a site and wrote to contact the customer support

It's more like explaining and supporting the site, rather than try it and give an experience.