Yes and no, IMO.
Yes, because I think the written medium is a good one for getting to know an INTJ, and believe it or not, there are plenty of both men and women out there who appreciate INTJs romantically once they've gotten to know us

; the tricky part is getting picked up by their radar in the first place.
This isn't quite a dating site success story, but an INTJ in my acquaintance became a veritable ladykiller partly on account of his active participation on a mailing list that went out to 100+ people in our subculture. The mailing list hosted a lot of, uh, spirited conversation

, and the written medium and slow pace of communication were perfect for demonstrating his unshakeable alpha male strength (calling things as he saw them and remaining calm in the face of aggressive disagreement), his stimulating intellect and his understated humor. I myself have enjoyed the feedback I've gotten from some of the gentlemen of MBTIc

despite the fact that I've never posted a picture.
No, because we aren't likely to meet the right people on dating sites. However, this argument is contingent on my personal experience that ENXPs are the best romantic matches for us, so
if you're an INTJ who is absolutely hell-bent on dating other Introverts, by all means, hook up online.