Hi Aurélie,
The "Used" units will only increase when you use more units. The
"Remaining" units refers to free units that may have been allocated to
your account. If you have increased your budget you can continue to
use units up to the "System defined unit cap".
Best,
- Eric Koleda, AdWords API
Hi,
I have a problem with my Budget and Used API Units. Actually I had a
very low budget (ie 350€) and it gave me a certain amount of API
Units. It left me no Unit at all which is normal since I really need a
lot. So I increased my budget to 2500€ and my Used/Remaining API units
remained the same