30 min game is great. But, on internet, it is not suitable. There are too many reasons.
On internet at most is 10 min. Beyond that, it's not reliable anymore.
Well, you can still play on internet 15 min, 30 min, 1hour or standard chess 2 hours for 40 moves. But often than not, you will be disappointed.
I don't like 30min games because some players AFK when losing.
That is why i suggest we chain opponents to the computer. Tablets now. If they try to move away zap. Increase the sensitivity of the zap per attempt.