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Useful write-up on pastebin.fi. The thing I would add is that the funding route matters more than the trading fee for most people starting out: bank transfer versus card can be the difference between a rounding error and a real percentage. I tracked both for a month and the comparison sits at https://www.fipst.com/about?lang=en_US and https://www.starttripnow.com/tours. Where the numbers came from is documented at https://www.syncesim.com/plans and https://www.esimalpha.com/news, and https://www.govoyagenow.com/contact-us and https://www.leddlp.com/blog?lang=en_US has the longer version if you want the detail.