I have $8k of AWS credit that expire soon. What should I do with them?

If you think your going to need servers down the road on AWS I would look into reserving a bunch of servers on three year terms for medium usage. Pay upfront using your credit and save money later on down the road.

Set up some boxes to help with Archive Team's current projects. http://www.archiveteam.org/index.php?title=Main_Page

Also, how did you get this credit?

Lots of projects you can help here: https://boinc.berkeley.edu/projects.php

great idea. looking into it.

Buy some reserved instances and then put them for sale.

Create a bitcoin mining farm from EC2 instances ;)

http://www.seventeenorbust.com

MINE DOGE

resell ?

open for that idea.