Yep, and with fair use you are more likely to be found infringing if you use the whole text, or uncredited.
However for informal purposes when not in a position of a content creator, article writer, or generally where one stands to make profit, gain standing, etc, this tends to be considered a non-offense until the genuine owner of the material initiates a takedown / cease motion. At that point the site owner / etc are compelled to act, but not before, and penalties are withheld until non-compliance is evident, or unless the host of the material in breach is found to be profiting / knowingly avoiding attribution.

While Steamgifts could potentially be asked to remove it or force accreditation (if the owners actually gave a shit about a rando in an internet forum copy-pasting snips of their written word), it is only found to be 'illegal' once challenged and refused (or the infringing party neglects to act in a timely fashion).

The thing is, if I try to elaborate on this level, they're just going to give me a glassy stare and try to insist that this is a hard crime with no room for interpretation and that 'the spirit of the law' doesn't exist, etc. ;P