Yes, their announcement is a clear sign that they are in scam mode. They will continue to try to push accepting more cash until they finally disappear.
Customers should ask for invoices from Global Foundries for the 1st and 2nd tapeout. If these documents exist, and only then, customers may consider to choose to go for the new deal.
Otherwise everything is built on new lies and won't end good. There is to much selling and marketing and almost no product in Alpha's current activities. To start shipping end of September they need to have very detailed plan and report to the customers on weekly basis.