Since v4.29 Maps Marker Pro also support Stadia Maps geocoding.
For current pricing, please see https://stadiamaps.com/pricing/ (with a “Free” account, 200.000 credits/month are included – April 2024)
Terms of Services: https://stadiamaps.com/terms-of-service/
In order to enable Stadia maps support, you have to do the following steps:
Alternatively you can also register an API key in step 4 and add this API key in step 5 (and also selecting “API key” as “Authentification configuration”).
That´s it. Afterwards you are able to use the following Stadia basemaps geocoding: