We’ve been trying to get our twitter cards working for both Profiles & Subdomains.
Two problems so far
#1) Problem is profiles are wildcard subdomains
Example Profile: http://john.minus.com and I am unable to find a way to whitelist/parse it properly.
#2) Photos work but sometimes randomly we are getting
Error: Failed to get a proxied URL for the image.
Link Used: http://minus.com/lqZTZ6X1rjZw6