[genericuser]

After a week or so for people to adopt it send out $1 gifts to 100,000 (or however many that will represent a rounding error in dollars) people with accounts meeting some set of activity requirements, who have not yet signed up. They then have to enter their info to claim it, once their info is entered they have no barrier to use it and may send money to others further spreading it.

Also publicize that you will be giving like $1,000 to 100 lucky fb pay users who have performed at least 5 transactions, after 2 months of fb pay.

I mean Facebook just needs to get a decent initial seed of people to add their info, and for it to be so painfully stupidly easy that every relative on Facebook can now send their nephews/nieces and grand children those $5 birthday gifts so that it spreads.

[warkdarrior]

Plus Facebook can mine the FB social graph to figure out which people to incentivize with gift payments, to maximize viral spreading.