I'm not trying to be a negative nancy here, because I DO WANT Star Trek 4 with the Kelvin timeline crew. However, Paramount also had sequels to Terminator Genisys lined up, which are now canceled, and it made $100 million more on a budget of $30 million less than Beyond.
Now, of course, many other factors come into play, such as the fact that Star Trek (I think) is a bigger brand than Terminator, with a larger and more dedicated fan base. Maybe Beyond will keep making money for years and years while Genisys is pretty much done. Maybe Blu Ray and digital streaming sales for Beyond will be great.
Maybe J.J. can use his clout to get Star Trek 4 made that otherwise might not be. Hell, he doesn't seem to be doing anything, maybe he will direct it to finish up his saga. Having the director of The Force Awakens might give Trek 4 a boost in box office. J.J. Abrams is a house hold name the likes of Nolan and Spielberg these days. Maybe the good will from fans over Beyond compared to Into Darkness will give them some leverage. Maybe Discovery will be a huge hit and give them more confidence. Just many many factors. I wish they'd tell us something.