If your movie theatre offers Super tickets (movie tickets at a higher price that enable you to get an early digital copy) then buying them will help The Divergent Series: Allegiant to do well as over 90% of it will go towards the movie's gross. Even though they've said that The Divergent Series: Ascendant's movie (the grand finale of The Divergent Series movies) will still be happening with a trimmed budget, they could still change their minds about it later. If you or anyone that you know wants Ascendant to happen, then I'd suggest seeing Allegiant's movie as many times as you can, each time paying for those Super Tickets if possible.