Debt? No. Debt is for when you buy, good & services on credit, which is effectively alone and you pay interest on it whether there was a bank involved or not.
Here this is something they sold, not bought. I believe the correct balance sheet category would be "Current Liability" but IANAA.
if you think this is irrelevant detail for techies you may be right, but on the other hand, accounting practices dictate far more than you realise!
Ever wondered why your those credits you bought for that service you don't use expire? Seems dodgy right. But it's simply because the bean counters don't want to see current liabilities - which are considered temporary and operational - into non-current liabilities - which are considered more like problems and impact things like company valuations.