"The entire article is FUD – the license is rather clear in indicating that as a condition of using AWS you promise not to bring IP lawsuits against Amazon, the duration bit is only too long if you don't read that clause all the way to the end, etc."
It really isn't FUD, actually, despite the attribution.
First, You promise not to bring IP lawsuits against Amazon or it's customers, actually. Second, in fact, yes, if Amazon uses your open source (in some way that is a violation of the license), and you use AWS, you can't sue them.
Which is what the parent asked, and in fact, the clause specifically prohibits.
(Whether I like these clauses or not is another matter).