Many companies are struggling with how to change their planned advertising in light of the pandemic. With McDonalds vs Burger king for their recent takes on how to market within the pandemic (BK doing a much better job than the former), some companies like United Airlines have actually donated their ad space for orgs that are operating to help with relief efforts. 

https://www.adweek.com/creativity/with-travel-on-hold-united-airlines-donates-media-space-to-unicef/