In Germany, it's not one long string of all candidates, but the TV channels have certain slots between shows that are semi-randomly assigned (semi-randomly in t

In Germany, it's not one long string of all candidates, but the TV channels have certain slots between shows that are semi-randomly assigned (semi-randomly in that each spot is shown equally often), with one party per slot. That way it's a fair chance for every candidate, and people have less an incentive to turn off the TV - it's just one ad, after all.