CO2Science, one of the most prominent of the rabidly skeptical global warming web sites, is no longer free:

For the past seven years, therefore, we have provided everything we produce free of charge to everyone, sustaining ourselves with grants and donations from numerous sources. Over the past three years, however, income from these sources has declined dramatically, and additional cuts are on the horizon.

The Idsos, who run CO2Science (and who in the past have received funding from ExxonMobile), have provided a major clearing house for information used by global warming skeptics. Googling a major climate research paper frequently brings up the Idso’s analysis on the first page of hits. That seems to be all fenced off now, behind their paid subscription wall.