Firstly, I don't know what you mean by less developed, but I'll just consider it as a typo.
Secondly, the case in Indonesia is probably because the community is quite solid. They've been there since the first phase. Moreover, with the recent elevation on Bitcoin for the past few years, it just going to make them even more enthusiast. Not to mention the overall population of the people tho.
population. With more than 250 million people, one can't deny that at least some of them might have heard of Bitcoin. Given that the data was obtained by doing online research, obviously one of the highest numbers of internet user will be on the list. Plus, there's Bali (The Bitcoin Island).