Turning down hundreds of thousands of dollars of cloud credits because of vendor lock-in is extremely shortsighted for the overwhelming majority of projects.
I think it is extremely LONG-sighted: an individual research institute might save $100k right now, but the lock-in might force 10x pay in 5 years to continue research. Not to mention it might affect ability of smaller institutes and individual researchers to enter the field, which is also worse for research as whole.