I'm on board as one of the folks to receive questions, and yet every time I visit the site, it asks me to log in again, unlike almost any site I have signed up for as a regular participant. I probably do some kinds of script-blocking that only a minority of users do, so this bug in persistence of sign-in information may not have been experienced by anyone else, but I'll not for the record that I don't even see a display of a way to log in with Facebook, so that's probably a symptom of the same issue. Never assume anything about the characteristics of the user's browser unless that is mission-critical for your site. I can use other online sites (including Facebook) just fine.

AFTER EDIT: To answer your kind follow-up question, caoxuewen, I'm using Chrome with all of the following extensions installed, mostly with default settings:

Adblock Plus (Beta)1.2

Warning: This extension failed to modify a network request because the modification conflicted with another extension.

Don't track me Google2.0

F.B. Purity - Cleans Up Facebook6.6.2

G+me for Google Plus™6.0.3

Ghostery3.0.0

Google Calendar (by Google)0.7

Google Tasks (by Google)1.0

Google Translate1.2.3.1

Google Voice (by Google)2.3.6.8

Highlight to Search1.0.36

Send from Gmail (by Google)1.12

Show Full Domain on Hacker News posts1.0

(I'll work on fixing the one conflict while you figure out what's going on with Askolo. Thanks for your help.)