"The British government, concerned about the number of venomous cobras in Delhi, offered a bounty for every dead cobra. Initially, this was a successful strategy; large numbers of snakes were killed for the reward. Eventually, however, enterprising people began to breed cobras for the income."
This is addressed on the Buy Offsets page. Quoted because I thought the same thing as you:
We never pay our partners more than the market price of new refrigerant, removing any possibility of a perverse incentive. And because we use well-studied industrial processes, as approved by TEAP at UNEP, there’s no science risk: no carbon is going to bubble back out in 5 years, like you might worry about with soil, forestry, or other nature-based processes.
https://en.m.wikipedia.org/wiki/Perverse_incentive
"The British government, concerned about the number of venomous cobras in Delhi, offered a bounty for every dead cobra. Initially, this was a successful strategy; large numbers of snakes were killed for the reward. Eventually, however, enterprising people began to breed cobras for the income."