Top 2 tactics: Existing Users and Industry Influencers.

First, leverage the existing user base. Incent referrals with $5 for every new free user they get to sign up and start using PT Engine for a new domain.

Second, reach influencers and offer them the same deal when they tweet / post to / email their audiences.

Make the offer a 60 day free trial instead of the standard 30 day so that they are providing value to the people they refer as well. This is critical - don't make them feel sleazy, make them feel (and look) like heroes to the connections they share PT Engine with.

That's $9k to get 1800 users, leaving you $1k for graphics, referral tracking system, administrative costs. I assume the $10k budget does not include your time - if it does you'll have to reduce the incentive, which will definitely make it less appealing.

If you want to dive deep on reaching influencers, schedule a call with me at www.clarity.fm/ryandraving