[colesantiago]

so why do they need to know my linkedin profile?

I know it's optional, just curious about their motives for data collection.

[SilverBirch]

Most likely they'll do a Facebook style thing - launch with some level of exclusivity to build buzz.

[costcofries]

They're obviously trying to curate the supply side of the knowledge marketplace.

[duxup]

I was able to sign up without filling that out at all.