I'm pretty sure they aren't pollinating, I think they are thieving the nectar. If they are doing the plant some good, like protecting it from herbivores then it's all good.
Ants Nectaring On My Ilex Crenata Skypointer...
They'd be working pretty hard to get from a male-flowered plant to a female-flowered plant to accomplish pollinating in Ilex crenata.
I suspect there is some sugary substance that attracts them, but that's a new one on me.
I'm sure they are capable of working that hard, I've heard what they can do with Rubber Trees. ;)
Ha! Like the rubber tree comment. I say that often to me family when they feel over whelmed.
Birder, it's a good motivational story. :) I think this might be Monomorium minimum (little black ant), the same prize fighters that protect aphids in exchange for their honeydew.