You're correct that money is a problem, I can't afford to spend a lot of money on ads until I reach the point where they generate enough subscription revenue to be profitable. Polishing the product to bring it out of beta and then raising the price could help here.

I actually did run a tiny experiment with $20 on Google adwords, but I wasn't impressed because:

- I had to pay over ¢30 per click. - It gave me a high proportion of users using IE <= 9 on which the site doesn't work properly.

I'll probably work on a new ad in future. Do you have any suggestions apart from Google Ad-words that may be appropriate?