Coupon codes for doubling up on features in Sanity

Hello. I would ask a question. As far as I've seen in some videos, Sanity allows us to double up on some features with coupon codes.
Do Sanity Studios prepared with these coupon codes always remain as Free-Boosted? Does this have a deadline?

No, there’s no deadline for Studios created with a coupon. They remain on whatever plan you used when it was created.

Thank you for your help. That's great!