Recently, when researching about electric bikes in India, I searched for a bike brand on Google Search, trying to find reviews. And, this shows up - an Amazon ad.
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Immediate reaction: "Seems like Amazon has sponsored links for all products. Who would sell bikes on Amazon?".
Nevertheless , I clicked the sponsored link, just to see what shows up, and I sure was surprised! It was actually possible to buy the bike on Amazon, take the receipt to the dealer, and drive home a brand new electric bike.