I have the rack in the picture. We've travelled with 4 bikes on it often. Never an issue.
I weigh 300 pounds and stand on it to wax the back end. It has very little flex when I'm on it.
I'm going to remove it for our long summer trip this year. We don't need the space, and I'm betting it weights over 100 pounds.
2013 F150, EBoost,4x4,CC, MaxTow
2015 Surveyor 245BHS