DNDBeyond is Wizards of the Coast's official 5e digital support site/tool. It contains a rules compendium, monster listings, spell and item descriptions, and space for homebrew spells/items/races/feats/&c.
Many old(er) dnd-5e questions do not link to DNDBeyond, as it didn't exist at the time. We have affirmed that it's perfectly fine to link to DNDBeyond in questions, generally noting that its non-SRD content is behind no more of a paywall than the printed products themselves.
Recently some editors have been making good-faith edits to add DNDBeyond links where there were none before. That hadn't caught my eye until someone pointed out to me that the texts that made their way into DNDBeyond don't always perfectly match printed texts. [I don't have any examples at hand: readers please feel free to add a few examples.]
Should we be adding DNDBeyond links to questions where the author didn't include them?