It's so Awesome to See All the Cool Stuff Are Now in Cashshop.

[Alexandre_Noireau]

The term microtransaction is usually used for games that promote lootboxes

No.
Cash Shops ARE microtransactions. That usually is just an assumption.

Here is the definition: Microtransactions, sometimes abbreviated as mtx, are a business model where users can purchase virtual goods with micropayments.