API Keys for Elementor Google Maps

Hello everyone.

I have a big problem and I cannot find the solution on the Google page.
I’m using elementor to create a webpage for a B&b. The page is now in local, registered under my email. I also own my portfolio website, that also has a map.

Now, considering I understood 50% on API keys, I tried to understand if with the same mail I can use two keys for two different websites. I actually have two “projects” on Google Maps, but today suddendly i got the dark map with the “for development purposes only” watermark.

I don’t undersatand what happened ??

It seems I need to register with my credit card to buy additional credits, but to be honest my site is just for job hunting and the other is still on localhost, so where is this generous allowence given by Google that is advertised on the Basic version?

Probably understanding just 50% I messed up everything…
The fact is that paying a lot just for stylise a map seems too much…

For surte someone had the same problem… if you do please help me ?? Thesze issues are very bad for the self esteem ??

Thank you in advance guys