One of our clients has a cancer facility. In Canada.
We have been running some effective remarketing campaigns for them for a couple of years based on a simple combination list of All Visitors less Converted Visitors - we have also been running an RLSA campaign and a campaign to the "Similar to" lists - pretty standard stuff.
Yesterday our lists got disapproved and closed. Not the ads, not the campaigns - the lists themselves. The messages on the campaigns referred to the fact that the lists could not be used.