Nice entry @sapwood. I like the tiered system in Poloniex. With just your email, name and country, you can do a reasonable amount of trading on the exchange. Their fees are also encouraging too. One of the lowest you can get. Poloniex is really an exchange to use for me. You really took time to go into the details of trading with Poloniex especially with the use cases you mentioned. That was class.
Thank you.