I think there's some confusion here because the word claim is being used in multiple different senses. @littleadv in your comment 3 up from mine you said "Bob is claiming something that is not true" which you are definitely correct in that it is fraud. But in your comment directly above mine you're talking about "claiming" the discount. Here, the word claim simply means "redeem" or "apply".
The argument, then, is that the presence of "limit 1 per household" in a T&C doesn't automatically mean that creating an additional account inherently invokes a (mis)representation of "nobody in my household has ever used this promo code".
Discussion on answer by littleadv: "O…
Discussion on answer by littleadv: "O…