Monkey V Monkey (MvM) not working?

Solution 1:

In my time on Bloons Monkey City on Android, I've found roughly 95% of people do not attempt to defend against attacks. There's a timer that will eventually time out, (I believe it's around 24 hours) and when it does you should get a message stating that they failed to defend. When that happens, you'll get a "win" bonus, which includes a few bloonstones.

Thus, I will send attacks ASAP when my bloontonium is full, just for the chance at more bloonstones.

Contested territory is a bit more of a fight for me at least. It's definitely worth doing, so long as you are good enough to get at least one of the rewards. It's an excellent way to get free Monkey Knowledge packs, and there are Bloonstone rewards as well.

Players aren't placed into a contested territory until they load the contested territory screen, so technically those people have to be playing. However, it might be that they never make it to the first milestone, or they load it and see someone else's progress and decide not to even try.