Re. "Since the review was rather quickly approved, I can only assume they didn’t read it in its entirety," I think an Amazon bot read your review in its entirety while an Amazon human may or may not have. The bot would have scrubbed swear words, urls, etc., from your review and flagged a human if your review exceeded certain metrics. I think Amazon can't detect shill reviews so they don't even try. A shill can create an Amazon account, buy a bidet, write a glowing review as an actual purchaser and no one's the wiser. How can Amazon tell this bidet shill review apart from others who really liked the bidet? It can't. Amazon can't do anything to keep shills out. Glowing reviews regardless of origin also help sales so where's the incentive to stop shills?