Perhaps the intervention of the FTC lead to a change in organisational incentives that made the organisation more wary of allowing possibly-fraudulent ads.
It's worth noting that the FTC seems to have only stepped in here because of the "negative-option" recurring payment model these sales channels were employing. They made it very difficult to successfully stop purchasing the advertised products.
Perhaps the intervention of the FTC lead to a change in organisational incentives that made the organisation more wary of allowing possibly-fraudulent ads.