Well, I guess I'll say it again.
Paid users come from one place. Free users. Period. If you limit or stop the incentives to invite new people to the site, Geni will die quickly. It takes quite a lot to see the benefits of Geni. Personally, I got to around 8,000 person tree before I was able to "reach" to the "big tree" and see how awesome Geni is.
I had no problem paying for lifetime membership, because I saw the permanent, long term value that the site _had_. I have to say had because if Geni is going to eliminate a free user's ability to add fourth cousins and closer, then MY lifetime membership is worth far less. I was hoping to use Geni to connect with distant family and let them add their own information! Now they can only edit profiles I've added? That's asinine. (Or rather, that's Ancestry)
Suffice to say, it's a terrible model. It's why Geni was about to dominate the genealogy world like Facebook dominated Classmates.com and over 100 other popular social networks. Facebook won because it remained free.
But I have to be blunt with Job and Dan's suggestions. I like their spirit, but suggesting that free accounts can only add or manage 25 or 100 profiles each is just absurd. The value in Geni is letting everyone contribute. Paid features are great, but if a user cannot see the amazing value in a Geni membership from their FREE account, then why would they ever pay?
I think an absolute bare minimum free user condition should be fourth cousins and closer, plus 100 more people direct ancestors outside their fourth cousin tree.
This is the path to exponential growth. More paid users will come from more free users.
If Geni is struggling for money, then the solution is give more and more responsibility of "managing" Geni over to Curators. That's the thing about any wiki project. Wikipedia has a tiny number of paid employees, who are mostly engineers. Let the community to the "busy" work.
Geni shouldn't be looking for more money through more paid users today, they should be looking to offload more of the management of Geni to volunteers.
And if Geni hits a money crunch, do what Wikipedia does. Ask for donations. Put Pro memberships on sale for a few days. "Sales" exist in all forms of commerce because they work. People like getting a "good deal"
So the question is. Does Geni want to be Classmates.com, or Facebook.com ???