I purchased 5 codes. It's extremely slow in China; I myself is located in NYC. Each time I was testing with only one individual residing in a different region in China. I asked them to do speedtest.net, and all of them hit 50-100m/s download speed range. It is, therefore, useless for me. Zoom works great, but it requires downloading/installing their app. Can you guys add an AWS server in either Tokyo or Singapore? It'll solve the problem for Chinese clients.

Also, I remember I saw that 5 codes would give two consecutive sessions. Now there's only one. Each concurrent session requires an additional code, which would be too expensive in this regard.