DoorDash is getting into the advertising business and will list restaurant ads on the platform. Restaurants can compete for ad space through a bidding system, but DoorDash will only be paid if orders are placed at the advertised business.
Twitter has introduced a soft block feature to its platform. You can now remove a follower without them knowing, preventing them from seeing your tweets on their timeline. However, that former follower will still be able to see your tweets by clicking on your profile and can send direct messages.