Yes Amazon is really quite easy to use and found it got quicker downloads at the beginning but then Google overtook it in the long run.
I tend to check it once a week now
Not sure if we can upload apps onto Windows app store as desktop games but their dev account is a one off of $19 and would be a good one to do.
Apple is better value now that the payment covers iPhone, iPad and Mac but they are a real pain when it comes to submitting.
I have had the Mac version of Paint Pot rejected twice now with the last taking 4 weeks to get a look at being reviewed and it is only little things that need tweaking which seems very petty.