I believe you'd be quite able to continue as long as your business either exclusively listed their own products... or stopped participating on the open marketplace you're hosting.

It'd be interested to see if this law would interact poorly with partner product reselling - "Oh yea, if you buy our CAD module we'll throw in a free copy of CAD with it" might actually come afoul the law, depending on the specifics. I'm sorta okay with losing that though.