Amazon affiliate revenues go up to 9%. I'm sure you could negotiate something similar with other providers.

Possibly you could offer people an guided Internet shopping experience in the mall - people come in and, with the help of an 'Internet shopping expert', buy things at Internet prices for later delivery. As you suggest you could monetize by collecting the affiliate commission.

If running a kiosk in a small mall cost you $20,000 a month (?) you would need to persuade people to buy ~1,000 $200 TVs a month.

The biggest barrier I can see would be overcoming the hostility from the other stores who would be really keen to kick you out once they spotted what you were doing. Because they occupy more square feet I'm sure mall management would oblige.