Counterpoint: I've been working in this industry for ~20 years by now and have deleted my LinkedIn around the halfway point. Turned out it was even more useless than that Facebook account I had axed around the same time (sadly had to go back there for access to the marketplace recently).

TL;DR don't bother with all that recruiter spam and general engagement tactics for yet another data hoarding, privacy violating "social network". If you are doing a good job and keep investing in yourself there will always be good jobs in this industry.

Build Trust and Carry On