On the one hand, people who believe global warming is a crisis accuse skeptics of taking money from fossil-fuel interests.
On the other hand, people who believe global warming is not a crisis accuse believers of taking money from governments.
It's unlikely either side has been bribed. Unscrupulously-greedy people are unlikely to become or remain scientists. Those payments that do exist are likely to be a matter of buying a megaphone for people already on the right side.