From what I've seen recently, business advertising accounts (Business Manager) are generally the way to go. They're more trusted by platforms, offer better control, and provide robust features for scaling. Personal ad accounts can work, but they often come with limitations and are more prone to restrictions, especially when using tools like cloakers or repeatedly running campaigns.
If you're managing campaigns at scale, a Business Manager setup is usually the safer and more future-proof choice.
If you're managing campaigns at scale, a Business Manager setup is usually the safer and more future-proof choice.