I did this challenge last year, and I did pretty well. This is a challenge that works for me because I do read quite a bit from these services. Thus I am going to try again for this year.
This is the first of various reading challenges I will attempt this year. Stay tuned as I do the sign-up posts for the others. If you use Netgalley and/or Edelweiss, this may be a reading challenge for you as well. Click on the link so you can check out the details, and I already have two titles listed as completed (reviews will come soon).