Hacker News Reader

I assume ($10B) is the current Dropbox, Inc. valuation. Is it somehow relevant here?

Yes, that a company with $10B valuation must necessarily have somehow found a market.

It's a reference to an infamous HN comment about how DropBox is trivially replaceable by an invocation of rsync and thus has no market value.

Yes, but the reference is irrelevant because the OP of this thread never said anything about this service having no market value.