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Good luck with that theory
Anything is possible but I doubt you will see any CLI with no history
If you ever want to see your Amex grow, use it. Amex does soft pulls, and does account reviews on your credit report, so if you wanted to do your own 3x CLI in the future you'd want it to show some use for best results.
It happened to my daughter ($1K to $8K with no use, but an adjustment of MSD), but I certainly wouldn't recommend it as a CLI mechanism, especially with a spendcentric lender like Amex.