My specific point of discomfort is that imperatives may be fine in menus, and lists, and buttons (where "click here" is never going to happen anyway). But as an inline hyperlink they seem idiomatically incorrect. "Learn more about Amaya" is still an imperative sentence.

I guess technically, "To learn more about Amaya, view the datasheet." is also an imperative sentence. But to my mind, it scans better as inline text. Not quite sure how to nounify that one either. And interestingly, inability to find the "learn more about" link on landing pages for products I'm interested in is a source of constant frustration for me. There should be a word for "something halfway between the the breathless lede on a landing page, and "here's a thousand pages of documentation". For hardware products, the "datasheet" is exactly what I'm looking for; there doesn't seem to be an equivalent for software products.