Help me decide the long term project, App or Amazon FBA

Hello all BHWers,
before, I'm really sorry, I have bad english...

I currently working on CPA, spamming on google serp, all automatic.
Since google getting smarter, it harder to spam there today.
There other reason as well, you may know how CPA works that make me want to quit.

I'm hoping advice from all of you who have tried android app or amazon FBA.
What's better for long term purpose, I hope it took less of work like what I've done with CPA.

thank you all

If its long term I would go with App. I am assuming you're thinking about coding an app from scratch?

First, with app you are independent of Amazon and their business model.

A more complex/technical learning experience will be gained.

The coding experience opens up so many doorways.