Ask HN: Best way to monetize free compute power?

For various reasons that I won't go into, I have free access to an unused g2.2xlarge EC2 instance (8 cores, 15GB RAM, GPU) for the next 6 months. What is the most profitable way to turn that free compute power into money?

I am currently attempting to mine ETH (I have never mined anything before), but from my limited understanding this is probably a waste of time with these compute specs. I'm sure there are up-and-coming coins that would be easier to mine, but the variety of choices is quite daunting. According to my tests, it has a mean hash rate of ~1MH/s, and a max of ~3 MH/s.

Bandwidth will be billed at the regular AWS rate, so any schemes that involve moving large amounts of data around will probably be unprofitable. I also have limited time (I work full-time at a startup and do consulting on the side), so labor/time-intensive ideas like starting a WordPress host will not be possible. I have ~20 years experience of programming and linux skills, so suggestions can be technical as you like.

I'm not expecting to make huge sums of money, but beer money would be nice, and would avoid having the machine sitting idle. I'm willing to try out any (legal) suggestions, however left-field they may appear.