Why would a junior dev be using _their_ card details? Surely your company has a corporate billing account with Google for this purpose?
Perhaps I've misunderstood the situation, but if I were working as a dev at a company and was expected to provide my own card details to pay for APIs, I would walk out the door.
They were just told to make the portal as a learning teambuilding exercise, choice of tools was entirely up to them - i even told the person company would pony up for anything they ended up spending. HR was being a pain about getting card details(it's not easy getting that stuff in india)
The dude bounced off google maps as soon as he saw the form to enter payment info and went straight to open street maps.
Not everyone is a rockstar engineer in a top 5 company my guy, people have to start somewhere and paperwork is a huge show stopper in india in general.
from your comment history i see you're european.Europeans have way more protections and assurances in cases like this, india is a very different business environment...
Seeing as how i had to learn all the GIS jargon OSM uses by default, it was bad for me. It's not a bad choice but since we as a company can afford the easy of Google maps it's a waste of time
Perhaps I've misunderstood the situation, but if I were working as a dev at a company and was expected to provide my own card details to pay for APIs, I would walk out the door.