Well all Twitter links (annoyingly) are made to go through t.co, so either Twitter is generating and serving the link preview directly or it's its shortening se

Well all Twitter links (annoyingly) are made to go through t.co, so either Twitter is generating and serving the link preview directly or it's its shortening service that's being hit, probably for a cached response, not the upstream. But I agree this does seem strange, like it shouldn't be unmanageable load at all.