I'm surprised there isn't any math in this thread on how much they stand to make with this, so I'll try with a bit of napkin math. NortonLifeLock reported 21M

I'm surprised there isn't any math in this thread on how much they stand to make with this, so I'll try with a bit of napkin math. NortonLifeLock reported 21M customers in 2021, with 60% using Norton 360 (presumably the rest are using their identity theft products?) so let's call that 12.6 million computers (ignoring multi-computer licenses for simplicity.) You're not going to mine any Ethereum on a CPU, so let's assume we only care about GPUs. Let's say that 20% of users have a PC with a GPU suitable for mining any ETH at all, and within that 20% they have an average of 6GB graphics cards. The internet claims that a 6GB graphics card will average around 26 MH/s for Ethereum, which would have earned $38 in the last month of mining. Assuming Norton gets 25% of users to activate this (which seems high to me) we have around (25% of users activated)*($38 worth of ETH mined/month per gaming PC)*(20% of all PCs are gaming PCs)*(15% Norton pool fees)*(12.6M installed Norton copies) = 0.25*38*0.2*0.15*12.6 = $3.6 million per month, or $43.2 million in profit per year. If they enabled this for everyone I imagine they could easily get into the hundreds of millions of dollars of pure profit per year range. However, mining on a mid-range graphics card typically isn't profitable once you factor in electricity and the decreased lifespan of the graphics card. So while this is making huge profits for Norton, it's likely costing the users money if they enable it. At $0.10/kWh and 15% pool fees, you're negative on the majority of gaming PCs, and deeply negative on every single non-gaming PC. Pretty scummy move.