I come from a background where the conversion rate is dependant on a user spending a large amount of money. Free registration is new territory for me.

I know there probably isn't a clean cut answer to this question. Obviously conversion rates are dependant on many factors both specific to the market and the site/ads themselves. But since I have been working with sites where conversion rates are dependant on users spending large amounts of money, it is difficult to gauge what a good conv. rate could be for a free service.

I guess I'm looking really for a kind of poll like answer so I can get an idea of the region to aim for.