( Amazon ) Welcome back to This Week in Stratechery! As a reminder, each week, every Friday, we’re sending out this overview of content in the Stratechery bundle; highlighted links are free for everyone . Additionally, you have complete control over what we send to you. If you don’t want to receive This Week in Stratechery emails (there is no podcast), please uncheck the box in your delivery settings . On that note, here were a few of our favorites this week. The Cost of AI. The key to understanding and analyzing tech has been appreciating the implications of zero marginal costs, which govern the economics of everything from chips to software to services. AI services generally fall under the same rubric — fixed costs in terms of data centers and chips matter more than marginal costs (mostly electricity) — but the worsening shortage in compute means it is opportunity costs that matter more than ever . Companies will have to make hard choices, and the biggest loser might be the serially unfocused OpenAI.…