On the same day, we introduced 3-month free trial on Multi-AZ Standard, with a generous 750GB of >storage. It can be exclusively activated at any time through our Scaleway Console and will be available to >all who've never experienced Multi-AZ. By starting your free trial, you will benefit from a 3-month guided >immersion into the benefits of this class!

The changelog says:
https://www.scaleway.com/en/docs/changelog/?a=object-storage-473dbde2-9521

The existing free tier is evolving to better support our customers

Testing the calculator showed that 75GB free egress still exists, but no free storage any more.