It goes against their core principle though, of ensuring that their users are their customers, not the product. If advertisers become their customers, then the

It goes against their core principle though, of ensuring that their users are their customers, not the product. If advertisers become their customers, then the incentives might start to break just a little at a time. As long as you’re the (only) one paying them, you’re the customer. It’s a big part of why I trust them so much.