If you have an account with any of Meta's services, you technically have an account with all of their services. You may not use it, but it exists.

No you don't, there are Keepass apps for Android.

Full disclosure: GEEKOM A9 MAX in page coupon is not live yet, there seems to be an issue with it and GEEKOM is working on a solution. If you are interested in that model keep checking back between now and June 26 when Prime Day sales end.

The memory and nvme can be swapped and upgraded with standard parts. But the GPU cannot, which is the weakest part of the box. It's a dead product at these prices.