Clarification Needed on API Limits and Key Usage for Alpha Group

looking for clarity on API limits - I am part of the Alpha group so I'm supposed to have 100 generations/day -- I have two additional seats on my account so they would be limited to 50 generations/mo if I understand correctly. my integration may use several 100 a day or a few thousand a month. as there is no current way to just charge for overages, I can add additional seats to get more limits. do all of my accounts use the same api key and just add to my limits as I add them, or does each account have their own key? is there somewhere on each account I can see what my current api generation count is?