Having lived in two of those three countries, a lot of the internet is randomly censored. Browsing in Malaysia I'd sometimes get some kind of government page popping up with no idea why the site I was trying to visit was blocked (blocked porn sites are a given in both Malaysia and Indonesia but honestly, just random sites kept showing up blocked). Indonesia blocked tumblr for a good long while, and I'm pretty sure Reddit still is. Plus in Indonesia, I really don't trust ISPs to keep my data safe, intrusive ads are everywhere to the point I've blocked SMSs from any number I don't know because the moment I got an Indonesian SIM my phone started blowing up with ads.