Public hay

[Bushwhacker]

Taking this sentence:

"They'll make public hay with a press item about this piece of legislation or that border raid, but that's about it."

Please, meaning for "Public hay" and for "That's about it". Does this latter mean "That's all"?

Thank You

[Mister Micawber]

.
Make hay of = scatter in disorder; render ineffectual: 'The destruction of the manuscript made hay of two years of painstaking labor.'

That's about it = That's all; Only that.
.

[BobK]

... Bushwacker, from the wider context of your quote, do you think the people who 'made hay' got some advantage from it? There is a proverb, 'Make hay while the sun shines' [=take advantage of prevailing conditions], so until I saw MrM's response I assumed 'public hay' was a reference to this. Perhaps this is another BE/AmE thing.

b