No OOB Support
Currently plugin just sends html formaterd URL but does not try to use OOB tagging (which is de-facto standard across various implementations). That prevents other messengers to pre-fetch the image and show it inline.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Currently plugin just sends html formaterd URL but does not try to use OOB tagging (which is de-facto standard across various implementations). That prevents other messengers to pre-fetch the image and show it inline.