About navigation on click, I usually do everything inside my Activity. This does not need to go into the binder as the intent does not involve side effects.

For instance, I would have something like this

private void bind() {
  disposables.add(
    stateBinder.getStatesAsObservable().subscribe(this::render)
  );
  stateBinder.forwardIntents(intents());
  disposables.add(
    adapter.getMatchRowClickObservable()
      .subscribe(match ->
        flowController.toMatch(match.matchId()))
  );
}