TIL about it after reading this post. It seems to have started around 17/April

From the article:

a login barrier for reading does not really stop AI scrapers because bots can be equipped with accounts within a few minutes. Instead, many suspect that Amazon’s main aim is to increase the number of registered users. After all, those who are logged in can be tracked better – and can be provided with more targeted recommendations and advertising.

Are there open source alternatives to it?

    • tomenzgg@midwest.social
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      23 hours ago

      Wikipedia doesn’t offer user reviews, however.

      I do read Wikipedia before I bother reading IMDb – even before today –, though.

      • inari@piefed.zip
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        20 hours ago

        I just head to the Reception section and check the Rotten Tomatoes reviews