It costs money for reminding people to send in their ballots and until you do, you will be on a list for reach out. So the earlier you return your ballot or vote during early voting, the quicker you are off of the list and that saves money. The first few texts could cost like 12$ but waiting until election day could easily raise those costs to $100 per voter. So for the GOTV costs, vote as early as you can.
Very interesting discussion.