

Isolated as in only used by a specific region or culture. So in Weibo’s case, only in China with little connection to other countries. Another example would be 2Go, which was quite popular in Africa for years, but unlikely be to be known from anyone outside the region.
And after hours of troubleshooting, you give in and join the Discord where you’re promptly ignored.
Or if you’re really lucky, people are willing to help, so you spend hours more troubleshooting, often repeating many of the same steps, only for all of them to give up too. (As was my experience when I tried to switch to Linux Mint.)