I've never used the Odroid, but it looks like it uses an ARM processor as well.  I had to find a few work arounds on the pi to get the software to compile on the ARM processor.  In the end I think it is more cost effective to use an old pc or a vps.  It is definitely less headaches to get and keep it running.

I did get a secure node running on a raspberry pi 3 in testnet.  Unfortunately it did not even come close to meeting the challenge time requirements when it was able to even complete the challenge.

These are probably noob questions, but here goes anyways.

How much machine would this require (RAM, storage)?

What is the minimum hashrate you would recommend for before setting up your own Multipool?

How are we coming on the launch of the next ponzi?  I'm interested to see this back up and going.

I think it sounds to complicated.  You will provide more confidence when people know exactly when and how much their payments will be.  Keep it simple so more think they can "Play the system" and win.  The last run was simple and worked well while it ran.  Honestly I wouldn't change much, just provide more tips on how to make it last longer and advertise more on other sites.  Maybe post on a couple HYIP sites.

If this is an exact copy of bitponzi.io then what is better.  To be better you have to do something different.  It looks like the FAQ on your site is a cut and paste from bitponzi.io (including the blockchain.info link that actually points to bitponzi.io's address). 

I agree there should be more than just 1 game in town, but I would like to see differences/improvements between them.  This would give us true options and a reason to choose 1 game over another.