It would be good to have a collated list of potential masternode hosts - including the private ones on the list here.
I don't know if I want to continue with Amazon. I've taken my masternode down and I'm scared to put it back up because I just get charges flying straight into my bank account from nowhere.
I really have no clue how to predict what they're going to charge me - even though I'm on the so called "free tier".
You need to read what the free tier is very carefully. You only get a certain number of instance hours per month on the free tier and some instances aren't eligible for the free tier at all.
There is a price calculator in the AWS billing section that will allow you to almost exactly predict your bills including data transfer.
I must admit, the wording is not clear in relation to the free tier but now I have spent some time reading it, it makes sense and my bills are perfectly predictable.