All of the following use an advertising revenue model except: ...

[geoffrey]

All of the following use an advertising revenue model except:
 
  A) Twitter.
  B) Yahoo.
  C) Google.
  D) Amazon.

Question 2

Portals primarily generate revenue in all of the following ways except:
 
  A) charging advertisers for ad placement.
  B) collecting transaction fees.
  C) sales of goods.
  D) charging subscription fees.

[josephsuarez]

Answer to Question 1

D

Answer to Question 2

C

[geoffrey]

Excellent

[Dominic]

YES! Correct, THANKS for helping me on my review