Ask HN: Where/how to get more pre-regs for free WP hosting service?

We just started taking pre-regs for WebPub - a free WordPress hosting service:

http://WebPub.online

Obviously, the primary driver of our business model is the volume of free users, so we're looking to set the ball rolling with pre-regs.

I submitted the URL here yesterday which did not pickup any upvotes but the logs showed some 31 visits from here of which, 4 registered (thank you guys - and gal).

While we continue working on identifying avenues to announce/promote WebPub, I'd highly appreciate any feedback/suggestions from all here.

Thanks.