It is not that it is not necessary, but rather that you want the greatest exposure to the biggest players and the biggest potential clients, which I highly doubt VLDI is anywhere near achieving yet. Otherwise we would already have revenue!
It is just like saying why bother advertising when we already have a few clients, that makes absolutely no sense unless you are still not sure it completely works. You want thousand of clients and hundreds of interested parties in a buyout so it leads to a bidding War. You want to attract your big successful competitors and how can you do that all at one shoot unless you are at a trade show. VLDI would be able to attract the likes of Palo Alto Partners and the Fire Eyes of the world taking notice of what they have.
The only exposure VLDI is currently getting is via the Channel partners. As much as there are two sides to attending and not attending the one for attending far out weights the one for not attending unless VLDI does have what it claims it has!