This isn’t the US.. French billionaire have next to no stakes in tech industry. (See: https://en.wikipedia.org/wiki/List_of_French_billionaires_by_net_worth, the only tech company on there is datadog and that’s a US one)
I doubt L’Oréal or Chanel much for your online data.
Where did you see anything about his bank account? He got a bill from GitHub, no mention of a bank account being charged here
Where exactly do you get the rate limiting part from? 100.100.100.100 is provided by the Tailscale daemon on your local device and pretty much all resolving is done locally based on the DNS rules you have configured for your tailnet. MagicDNS will resolve your tailnet clients locally based on the network map, other lookups will be forwarded to your LAN or exit-node DNS / split DNS servers or to your configured global DNS servers if you have the override enabled in admin panel.
The iOS app is the exception for now but with the CLI and the core libs being open source it’s at least not off the table to make an alternate iOS client I’d say.
If you’re a little into self-hosting and can follow a readme on how to start a Docker container then you can even get around having any of your data on their servers and use a private sync server :)
To be fair, anything the GUI clients do can be done with the CLI which is still open source and on all desktop platforms and headscale is literally their open source control server.