You could say that about literally any shady business. Imagine seeing a PDF proving tobacco leaders knew for decades that it caused cancer and saying what you did.
Being monetarily successful does not mean you’re good or shouldn’t be criticised.
The fact that a shady business used some tactics to advance its cause doesn't automatically condemns the means.
Which is always bad.
Because of the latter, businesses leaders can also quite often talk about the former without even noticing that normal people regard "exploiting people" as a bad thing.
Sometimes it's hard to even agree what counts as exploitation of a person: The profit margin of every successful employer I've ever had is, in some sense, them exploiting me — but I've also worked in places where that's negative, loss-making, and the investors paid for my time with the profits made from others, which feels to me like the successes I've been involved with paying for the failures, not exploitation.