Cargo Bikes

Lots with rear racks on if you Google it but they do need to have attach to the central hole on the bridge. You could always use one of those seat post clamps with rack mounts on

I seem to recall @amey has a rear rack on his? I'm in the process of trying to fit one using pclips and a disc brake compatible rack but the rear light gets in the way so I think a blow torch and vice are going to be required to bend the struct to an amenable angle

then noticed these bullit bikes have no lugs for a rear rack, which is a wierd omission. Such an easy thing to install on a frame, and you'd think that rear end would be rated for a few extra kgs.

Completely agree, I have a rack on mine that I installed using M Part seat collar with rack mounts. Funnily enough my dropouts have a rack mount but frame doesent!

I'd say racks are essential on cargo bike esp if you are hauling a kid; you want easier/quicker access to stuff that you can take with you.

Mine is a racktime rack; its excellent.