Why are some shortened URLs resolved by twitter (as in - the long URL is indexed by search, as well as Twitter Card is displayed) and some aren’t? We have a simple URL shortener, and our URLs don’t seem to be indexed/resolved by Twitter at all. Example statuses:
Link to the same domain, shortened with ow.ly is indexed properly:
https://twitter.com/3marcin/status/463930775910768640
any help would be appreciated.