What numbers mean to you, may not be what brands are looking for.
I handle many accounts for clients. I've never posted their info here and I'm not about to start doing it for you. You don't have to take my word for it. But there are others here in BHW that also work with brands or for brands and would call me out if I was being a Trumpist. ie. Alternative facts, lier, whatever you want to call someone making up shit.
Brands will take follower and like/comment numbers over reach. That is just how they work. A 50K account may reach 5K, while a 200K may reach 4K (2%). Guess who'll they sign up? Yeah, the 200K in a heart-beat. Brands don't care about algorithms, they care about numbers up front - total followers, total likes, total comments. And, like I've said before, it's not what you know, it's who you know. If you buddy at the brand or PR knows that you fake it, they'll look the other way. This is not a monopoly toward Instagram accounts, it happens in many, many, other markets. You get the money, because you know the honey.