I don't think it's a bold assumption, but I also don't think the assumption would lead to the conclusion.

1. Why it's not a bold assumption: it's a bit shocking now. But in two years or so, many/most companies will realize this is the cost of doing business. Just like people are ok with using Outlook, or Office 365, or (in the case of Wall Street) Bloomberg terminals, people will realize that developers will need AI coding assistants.

2. Why the conclusion does not follow from the assumption: if the limit is set at $1500/developer/month, it does not mean all developers will use it. Companies will set incentives for people to not be very wasteful. It is more likely that on average developers will consume $100-200 worth of tokens per month, and there will be some outliers who will consume 10, 100, or 1000 times as much, but they'll be few.