Squarespace acts as a reseller for Google Workspace (for customers who start out by using their domain for hosting with them and want to add email/etc), so they

Squarespace acts as a reseller for Google Workspace (for customers who start out by using their domain for hosting with them and want to add email/etc), so they already had a relationship with Google. It makes sense that they would want to sell domains to their customers, but IDK why they would want to buy all the existing domains that likely are not in the market for their hosting service.