I couldn't find a justification for the level of exposure, the annoyance of the constant spam, the risk of a new security breach, and the laziness of having to manage passwords, a hardware auth device...
No effort here. Spam goes to spam folder. Credencial hack would be annoying but limited to LinkedIn. Hacker could scam my contacts. Hmm... low risk but low value, too. I'll think about deleting it, too.