People searching for something is reflective of what people search for, in some cases for products it's reflective of popularity but, I would argue in this case there's a good chance people are searching for Excel more for tips/troubleshooting/how to, than purchase intention.
If you look at a range of wide range business functions, opening and editing text documents is more prevalent than using spreadsheets.
Make sure you are fetching it via a S3 endpoint in your VPC instead of via public HTTP. You are paying for an (expensive) egress cost you don’t need to be paying for.
You have to fail FACTA regardless if you hold an overseas account. If you hold less than $10k USD than it's a few check boxes and takes less than 10 minutes