No, tiers comprise slicing the application horizontally by technology, basically, ie. "All database stuff here" and "all frontend stuff here". To me that's like "let's put all the house sinks in one room to ease repairs for the craftsman".
Services is more like feature folders? Where you define everything you need related to a VERTICALLY sliced part of your application, ie. Products, or whatever.
Services is more like feature folders? Where you define everything you need related to a VERTICALLY sliced part of your application, ie. Products, or whatever.