Do Sanity coupon code upgrades expire or remain permanently free-boosted?

Based on the information I found in Sanity's blog post about Studio v3, I can provide you with a clear answer about coupon codes for Sanity Studio.

The coupon code mentioned in the blog post (from December 2022) was specifically for a limited-time promotional offer. The article states:

"From now, until the end of the year, you can use the code productday to get a boosted free plan with increased API and bandwidth limits for your first month."

Important points about this coupon:

1. It was time-limited - The offer was only valid until the end of 2022 (the article was published December 8, 2022)
2. Duration was limited - It provided boosted benefits for "your first month" only
3. It has expired - Since this was a 2022 promotion, this specific coupon code is no longer active

To answer your specific question: No, Sanity Studios created with promotional coupon codes do not remain as "Free-Boosted" permanently. These coupons typically provide temporary benefits (in this case, one month of increased API and bandwidth limits), after which the project would revert to the standard free plan limits or require upgrading to a paid plan.

If you're looking for current promotional offers or want to understand Sanity's current pricing plans, I'd recommend:

• Checking the official Sanity pricing page for current plan details
• Contacting Sanity's sales team if you need special pricing or have questions about promotional offers
• Looking at their free plan features which are available to everyone without needing coupon codes