Get treated for the cancer you will now survive because you just caught early. The answer is so obvious I think I may have misunderstood what you mean here.
What if it's just some lump that would not have developed into cancer? The surgery to get it removed isn't risk free.
The fact that this answer is so obvious to you means you have to read up on diagnostic test performance and how screening works, because it's in fact not obvious at all. I mean that in the nicest way possible. Those companies offering expensive screening are not what they seem. Whether their offering is useful or whether they're just swindling you is a question that needs lots of time, money and sweat to answer.