It looks interesting. Sounds like they're going to be charging for an entire year of service up front or at least as part of an annual contract, which makes sense. (See: "Stardust will only be the beginning in a year-long partnership.") So this will be 21.99 euros ($26.04 USD) for the year. I wonder if this is an x86 instance or if it's ARM. Pricing would make a lot of sense if it was ARM.
According to the blog post "every service, feature and scenario currently provided via its DEV1-S instances will also be available on Stardust Instances" [0]. The DEV1-S is an AMD Epyc and the technical specs match up as well. So, that seems most likely.