I'm not sure I understand what you're reporting @Altiplano. Do you mean that after a certain threshold (stacking up a certain amount of, say, Rests), you no longer get videos for Rest boosters, but still get for other boosters? Is that it?

If so, then nope, all of four types of boosters share the same video queue. You can stack up as many rests or morale or what have you, as you'd like. This doesn't trigger anything.
After all the point is that the advertisers get someone to watch their videos, they get payed for the views, we get payed for the advertisement spot on our game. i..e.