[rtpg]

pretty sure expertsExchange required a paying subscription, whereas Quora is free. Plus cookies mean I'm not signing in every page.

(I mean free as in money, I am OK giving Quora ad dollars and building a social profile of myself)

[Netminder_EE]

Nope. I've been an EE member since 1999 and have never given them a cent. Some parts of the site are only accessible to Premium Services customers, but it's not all that difficult to earn them -- so no money out the door.