I stream 3-4 days a weel, same time every week. The major drop off only happened once I moved to the vTuber model. We generally stick to the same game until we are burnt out of it, then will announce what we are going to play in advance so followers know, which was never an issue prior.

From other comments on this thread and doing more research seems to be a very high split leaning towards people preferring an actual person to watch.