I would be for the service even if my don't use it. Why? Well, assuming most or a good chunk of the revenue goes to the band, and enough people use it, that might end up, in the long run, reducing actual concert ticket costs by a bit. If not, then the band makes more money, and could potentially end up with even bigger and better enhancements to their shows, like bringing some guest musicians on for an entire tour, or making a very elaborate show to bring around the world ie. Roger Waters' The Wall shows?
As for if I'd use it, if the price isn't too much, I would do it. On a tour like this where they don't change the set, I might not watch it AS much as if it was rotating, but I still enjoy hearing different shows that have different crowds and different performances, even if the changes are minute with the static set and click track. It would likely guarantee better quality than fan bootlegs too, not that there isn't some great fan bootlegs out there, and I would still support bootlegging. If there was a particular live-streamed show that I thought was worth keeping like a very special performance where something unexpected happens, or someone does a particularly outstanding performance (especially if its JLB) then I would still get a bootleg to save the show, even if the live-streamed shows are recorded to watch later, like what some users on twitch do.