Yeah, Coinbase is getting greedy. That's the problem with raising capital from VC's. They don't care about customers or service, they care about quick and clean ROI. That's why I have never accepted VC money, it's a death sentence.
That said, you can still deposit via ACH from your bank for 0.0% and buy bitcoin. But looks like the days of quick and cheap "Instant Buy" is gone. Their loss...