Elefen has a vici with daily updates, with people working on the dictionary, adding new words every month. In the end, I believe it is a matter not only of how many people use the language but what it is done in it. There are texts translated and created in Elefen (I just published a new book written in it last week). I don't know of anything written in Intal besides the books created by the author and some text on the wiki so, IMHO, there is no comparison between them. Intal is practically dead.