I was looking at their forums and they are having the same problem Mojeek had/has: they find many of the premier sites block nearly everything but Googlebot and Bingbot and many flatly refuse to allow entry or just ignore requests.
This does represent an opportunity for 2nd and 3rd tier mag review type sites to be on the 1st couple of pages of the serps, which normally have C-net, and a host of others hogging the top 20. Some of those lower tier sites have good articles - that is what I learned using Mojeek.
Of course some sources are irreplaceable like NYTimes, The Times, etc.
Anyway that may be causing problems.