I see. I must be honest, am very wary of this because if I was in your place I would have made sure to vote around the time the phase was ending as final voting judgement or at least as later on as I could.
D1 isn't necessarily in every game very indicative, but sometimes likely / somewhat likely scums can be spot and it's good voting them up to gain info via lynching or expecially if they look quite scummy, also by picking a rather random player to vote you are risking a mislynch in case of a tie, and in general you are still voting someone in this case, so it's not even about not voting.