Ask HN: How should we spend spare GCP credit?

We have been given a large amount of Google Cloud Platform credit ($70k+), which is due to run out in the the next 5 months. Our credit burn rate is less than $1k per month, therefore do you have some novel ideas on what we should do with it?

We would like to use it for "good" projects, and not things like running bitcoin miners! We have a background in ML and web software, although being a startup we have limited development time and resources.

If you suggest ML projects are there any readily available datasets for model training? Many thanks...