Why LinkedIn restricts outreach accounts
LinkedIn does not publish its detection rules, but the patterns behind restrictions are consistent: activity that moves faster than a human plausibly could, logins from datacenter IPs or IPs that hop countries, browser extensions injecting scripts into the page, and a pile of pending connection requests that nobody ever answers.
Every one of those is a tooling decision, made by whoever built the tool your team runs. Which is why we treat deliverability as architecture, not as a setting you toggle.