Everything except making a store people wanted to use? Ethan Evans, who was previously Vice President of Prime Gaming at Amazon, has a short retrospective of trying to take on Steam.
Video game news oriented community. No NanoUFO is not a bot :)
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My goal is just to have a community where people can go and see what new game news is out for the day and comment on it.
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Beat the competition, then enshittify yourself while your customer base sticks with you is the strategy used in all Amazon products. Amazon is the last storefront I would want to sell games in the scale of Steam.