You obviously can't ensure that his service is around in years from now. So your comment reads like a passive-aggresive way of saying that "you are a small guy,

You obviously can't ensure that his service is around in years from now. So your comment reads like a passive-aggresive way of saying that "you are a small guy, I don't think you'll be around for long, so it is essentially useless." Which is a valid point, it just needs not be veiled behind a rhetorical question.