Hello,
You can read my comment here :
www.joomlic.com/forum/icagenda-help-en/3...oogle-map-type#15723
Since iCagenda 3.7.2, the basic embed PAI was added as a Maps Service (2 choices now for Google Maps: embed (new) and previously used javascript API).
The Embed API (as described in information added in global options of iCagenda, if your language is up-to-date (you can set admin in English to read updated source translation)) is not limited as all other Google Maps service.
So, you can use the Embed API for now.
The billing will be a requirement for other only after 16th July.
In the linked message i've posted, i've talked about an opensource alternative to be integrated in a near future
Best regards,
Cyril