It may have something to do with this; to make sure that you get the right answer, you will need to ask Apple because there are legalities involved: when you post something, you grant Apple the right to do with it as they wish - see this excerpt of the terms:
License to Use Submission. By posting a Submission, you agree to grant Apple a perpetual, royalty-free, non-exclusive worldwide right and license to use, reproduce, modify, adapt, publish, translate, create derivative works from, distribute, perform, play, make available to the public, and exercise all copyright and publicity rights with respect to the Submission. If you do not want to grant Apple the rights set out above, do not send your Submission to the Site.
from here:
Apple Support Communities Use Agreement - Apple Community
And, in my opinion, aside from Apple, you may also need to ask the user who posted for permission to copy their post - if it isn't Apple's property, it would be theirs. Just because you find it on the internet, it isn't necessarily free or might be protected with a copyright. It would not occur to me to copy someone's post unless I asked first.