ESL company marketing needs to be seriously controlled
People in Western countries, particularly English-speaking but also in countries where other languages are spoken are told huge lies about how by spending a few hundred to a few thousand dollars, they can attend classes and get a diploma that will let them travel the world and experience life in a new country, learn a language while making a salary comparable to the folks back in your country. The first promise is absolutely true, the second is partially true (your colleagues will be mainly other expats or locals that studied English at university level so you have to actively seek opportunities to learn the language in your free time) and the last is simply not true at all. ESL teachers either go back when they've had enough of living in a crappy flatshare or end up having lived abroad for many years without any savings.
It needs to be made clear to young adults that TESOL is not a long-term career unless they get qualifications which can be used to get a job in a public school (which can be very hard to do once you leave your own country) or have the funds and skills to start a private business and have people teach for you while you take a share of the profits. I personally live well but I am not and will never be the main breadwinner in my family. Meanwhile many are living in poverty abroad with no clear route to improving their own circumstances.