Parking 800k in a Fixed Deposit Account in Thailand is not a bad deal. It's accepted at immigration.800k isn't imo a fortune if you've been working your whole life and are retired.
Yes, but it's not s tourist visa,it's a 1 year visa based on retirement. How people are using it is totally irrelevant. Correct terminology is important when discussing different types of visa.
Yes,at some offices you can travel in Thailand and do the next 90-days report if returning to the last reported address.This is the case in Chonburi immigration in Jomtien.
The total amount of mobile data is every mb you're using.You obviously don't know what "max speed" means. It's the fastest speed the cell tower can deliver every given second. Meaning,if you're in an area with many users,the speed goes down. This normally happens in the evening when people starts watching movies and TV and uses their phones as hot spots.You'll almost never reach the official "Max speed". This is how it works and nothing to argue about.