I remember they had an update of their ToU not long ago, maybe a year or less. As far as i remember those points you mention (1 and 2) were already in the text then, so it's not like they added it only now. What exactly they did change i don't know. I would like to see a side by side comparison between the current ToU and the previous version so we could see the exact changes they made.
You're right about point 1 actually now that I looked at a 19 June snapshot of the site. Point 3 (can only file from Massachusetts) is new though, as is the specific addition on the very first line: "binding arbitration clause and class action waiver". Basically, they've strengthened arbitration clause and class action waiver.
https://web.archive.org/web/20170619183449/https://poloniex.com/terms/
