NAT with IPv6 is a thing, it's trivial to do. I only have a single IPv6 address given to me by my VPN (ISP doesn't support IPv6) and IPv6 masquerading works perfectly fine.
it's a meta-search engine (a search engine that searches through other engines). I self-host one myself (although I host SearxNG, a fork). You could argue you can be identified because of the same IP, so you shouldn't self-host for yourself only - but there's very real legal and practical limits to tracking without cookies, so I'm reasonably fine with this, especially since I'm not the only one using my instance (although the user count is under 10).
You can self-host and use a mobile 4G/5G modem for the outgoing connections from SearXNG: the IP address is going to be shared between different users (at least with IPv4).
I chose a different system, you can buy something for yourself or you can buy something for everyone in which case the price is shared between everyone. Is it less fair? Perhaps the unfairness does accumulate (for example, I'm the only vegetarian here, but meat still gets added to the shared budget, but in exchange I eat more non-meat than others), but it would be really inconvenient to have, say, 3 packs of cheese (you can't just take an entire pack of cheese, so it can't be shared with your system). Also I don't need any labels!
the about section has the source code for the static site generator, but it really is nothing special, i just wrote it for fun and because i didn't feel like looking into existing ones
See КоАП РФ 20.3.3 and УК РФ 207.3, passed in March. You won't be jailed for a single tweet denouncing the war - but you will likely get up to a $1k fine if you are reported (and since around half of Russians support the war it isn't that unlikely you WILL get reported). If you are more politically active, you can get visitors irl (police coming to your house, or just random pro-government activists doing vandalism around your house/flat). Additionally, spreading "fake news" can get you up to 15 years in jail (but most people "only" qualify for 3 years). By the way, I'm Russian, so feel free to ask me further questions about the overall situation.