I have gig symmetric for $79.99. not a promotional rate, no caps.
Edit: the reason it costs more for symmetric with some ISPs has very little to do with "cost reasons" and very much to do with market segmentation. It's the same reason math coprocessors used to cost extra, even though it was on every package already. If a small group will be the only users and will pay extra, then make a separate SKU which includes it, call it business/pro/enterprise and charge a premium. It's profit maximizing pure and simple. The super obvious check is that there are ISPs which compete on friendlyness and don't do this. They're not special, they just make less money.
Edit: the reason it costs more for symmetric with some ISPs has very little to do with "cost reasons" and very much to do with market segmentation. It's the same reason math coprocessors used to cost extra, even though it was on every package already. If a small group will be the only users and will pay extra, then make a separate SKU which includes it, call it business/pro/enterprise and charge a premium. It's profit maximizing pure and simple. The super obvious check is that there are ISPs which compete on friendlyness and don't do this. They're not special, they just make less money.