That's an interesting example because I don't think we'd edit the title that way now. We try to replace corporate-press-release tropes with more direct language; but of course only if we can be sure that it's true. If people in the thread were complaining about the word "purchased", that explains why we'd have changed your title. But I cringe a little to see that we put press release language like "joining forces" back in there.

Corporate press releases are sort of a special case: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor.... I sometimes say they're an exception to HN's title rule, but that's not really true. The rule is "Please use the original title, unless it is misleading or linkbait", and the euphemistic, one-sided language of CPRs tends to be misleading (and sometimes is intentionally so).