NikonUSA today announced the Z5 Yellow program. Like the Z50 version that occurred shortly after its launch, the Z5 Yellow program allows you to try a Z5 camera risk free for 30 days. If at the end of 30 days you're not happy with the product, it can be returned to NikonUSA for a full refund, including shipping charges. All the kit options are available, including getting a US$50 FTZ Adapter along with the purchase.
This program is available until the end of November. At the moment, the purchase can only be done through the Nikon Store (going to be some angry dealers).