Are there any credit monitoring or "identity theft prevention" services that aren't outright scams? Most of them spend huge amounts of money on scare-tactic ad

Are there any credit monitoring or "identity theft prevention" services that aren't outright scams? Most of them spend huge amounts of money on scare-tactic ads, use shady free-trial-with-automatic-billing-that's-impossible-to-cancel sign-up models, and are cagey about what exactly they're monitoring and how their flagging works. It's too easy to run these sorts of businesses as "do absolutely nothing, collect checks every month, suffer no consequences if things go wrong because the event is rare, profit is purely a function of sales team size" operations. Kind of like the anti-virus market, actually... I guess this is a good match!