I don't know the details but they must make a lot of money in a good location, same McDonald's etc, but you need decent money to start one, not same a pikey bar
you sound like you are justifying very little or no exercise, like those who just do weight in the gym with little or no cardio. Dangers everywhere especially walking in Thailand maybe don't do that either
You don't want to be logging into gmail by inputting your password on some webpage you aren't familiar with. When i login via google\gmail no need for password, it knows it already. An example is Strava.com