In Spadesinator, Blind 6 is an optional special bid that works as a team bid: you commit to it before seeing your cards, your partner rides on the same bid, and making it scores 120 points (6 × (10 × 2)). That's how I've always played it. My question is whether other people play Blind 6 as an individual bid instead, where you declare Blind 6 for yourself and your partner still makes their own separate bid. I'm wondering how common that is if so.

Related question: do some of you play "Blind X," where you can go blind for any amount up to 13 (for example, Blind 8) rather than being capped at 6?