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.

in Indonesia the gov blocked 'porn' sites or any sites that have porn like reddit or imgur. it results in many websites that have nudity even in art form or medical nature getting blocked. at times this includes tumblr and even netflix but now its relaxed its stance a bit, for netflix at least.

rumour has it they even block some sites that have 'anti muslim' propaganda, however i don't know the validity of this claim yet but im not surprised if it the case.

the cencorship has been going for a decade now and its getting stricter each year.

source, i live in indonesia.

I know for India it's 'Censorship'