They're violating the spirit of net neutrality, but not the law. Since they aren't an ISP, they can't actually slow down or block you from accessing certain websites. The most they can do is slow down (or block) their own URL redirection service when its used to access to those domains. That's within their right of free speech, even if it's really fucking petty.

Just concede and learn from your mistake, because you're missing the point. Cloudflare throttles connections to sites as part of their DDoS protection, but that isn't even remotely related to net neutrality. On your site, you can do whatever you want, but ISPs preventing customers from accessing certain sites (or accessing them as they would "normal" sites) is what net neutrality is concerned with.

I was talking about Elon, but I’m sorry about your lack of baking skills in case you wanted to be good at it or something.

Twitter isn't, and shouldn't be under any obligation to respond to you proxying your requests through their url tracker with any service level.

Is it unethical? Yeah. Does it violate the letter of proposed NN laws? No. Does it violate the spirit of proposed NN laws? Also no. Those laws don't cover what happens while a request is inside a parties network, only the traffic that travels in and out of it, of which Twitter was manipulating neither.

Well, I suppose they could deliver a few packets with a couple microseconds of latency when they delivered the HTTP response payload but they would have to literally modify their OS's TCP stack to do so and the entirety of that actual throttling would be literally milliseconds of difference.