Does this use a web UI like all other Antminers or can it only be used with a direct connection to a Rasb PI or PC??

If Web UI then I will order a box, as could have one running in each room as a small heater for the winter.

Any plans to allow S3 coupons to be used? (would rather use coupons on this, seeing as S3's are more expensive now than they were in August even with a coupon lol).

Thanks