Bad marketing.
There are more spectactors and by-standers than rioters.
If you want to sell the rioters somethnig, sell them sour cream to help with the pepper spray and CS.
The profit margins on the tools of destruction are quite high.... Those ill-prepared folks that either forgot their supplies or didn't pack enough will pay a super premium.
Mind you, I do like the sour cream opportunity.. Kind of a closed market when someone is already in the poop..... My question, can they open their eyes to dig into their wallets to pay?