Cancelled Ask90Minds today. I do not believe we were getting enough search traffic and/or member confidence to continue it at $40/mo.
From my point of view the site attracted a lot of do-it-yourself traffic and in a year had not produced any inquiries for paying work.
Here's a copy of last month's traffic. The key number is daily uniques.
The 90 Minds site is usually about 3-4 times that in volume.