> One of the essential reasons why an "invasive plant" is so invasive is that they tend to consistently provide better rewards to pollinators

One might think this. A major invasive in our area is Japanese Knotweed, which is very attractive to pollinators, and is now my most reliable honey crop. But -- in this area, I have never seen it set seed. In fact, I had to go online to find pictures of the seeds, as I didn't even know what they looked like. For some reason, unknown to me, the seeds never appear on our local knotweed. It reproduces entirely by runners.

http://davesgarden.com/guides/pf/showimage/169730/


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