Paid editors are a scourge on wikipedia. Everyone with an axe to grind hires them. From revisionists trying to rehabilitate feudalism, or any of history's great monsters it appears, to any monied interests. Whether it's a polluting industry, and or a company exploiting workers in SE Asia in virtual slave labour, or a government official somewhere, there are dudes on wikipedia that are paid to do these things.
Wikipedia is only a good source on non controversial topics, at least unless you look at the actual sources submitted and can cut through the agendas, something most people can't seem to do well honestly.