I really wish employers would pay for a service like this because a lot of spear phishing attacks start with data stole or scraped from brokers, LinkedIn, etc. If a company buys a service like this in bulk, it can get significant discounts. Personally I've resorted to hiding my information on LinkedIn and noticed that I've been passed over by attackers while my coworkers get spear phishing attacks all the time.
Many employers do - we work with plenty of teams and even have specific guidance for how members can ask their HR or Security lead to sponsor a membership.