Why on earth would letlive ever sign up to do this tour. Certainly can't be the whole "to perform in front of a wider audience" because a. Band is huge right now and b. Not one person who'd attend this show would actually be going to hear music.
Letlive has already opened for PTV before, last year on their headliner with Miss May I and Woe, Is Me (when it still looked a like Issues) so its not at all surprising tbh. They also aren't that huge, they still want to play in front of as many people as physically possible.