@hatter @vitriolix @tofugolem @corbet oh yeah, it's definitely costing them money to run it and they're going about it in as good a way as you can expect — most of the old Twitter-era services just quietly stopped working while nobody was looking. To be fair OP was right, really this is Twitter's fault for creating an artificial need for these silly forwarding services in the first place, although I'm sure analytics services would have normalised it anyway
But it does feel a bit odd. Like, Google's core business is (was?) a constantly updating, publicly searchable live index of almost every page on the internet, and they really find it too expensive to maintain a static index of a billion or so string-string key value pairs you can only look up by the primary key with exactly zero UI that's already set up and presumably doesn't do much traffic any more? It's going to cost them more to shut it down this gracefully than it would to run it for another decade, surely?