I just have updated the Mega add-on in the official xbmchub.com repository with a single change, so from now it is possible to stream content from Mega inside other addons.
Main idea is simple, if you have this URL for a video hosted in Mega...
Mmm, i am the author of pelisalacarta.
And i am curious about why do you think it don't get much support...
There are lot of options in it to see movies like the link you suggest, and many of them works wel.
Not 100% of sites works, but it is normal.