It’s a great question. I am missing certain content from the niche sub-reddits and trying hard not to fall back to Reddit.
Some of this ‘reposting’ will help the community to add comments/interaction but as you mention may turn this platform into a leech.
Either way people implementing Bots helps the moderation teams to some extent.
I wouldn’t worry about the value difference too much but more the consistency. If you need 75 degrees on the edge then keep dialing up the temp until you get it.
It’s most likely only going to affect large prints at the end of the day.
Your printer will measure the bed from a single location so moving your IR sensor will vary across the bed. If your using a custom firmware I’m sure you could set this as an offset assuming your IR thermometer is accurate ;)
Heat of the bed will be the warmest point and the periphery cooler (just like your body temp)