Can anyone say if massbuilderpharm is close to shutting down? Is he still legit?
The obvious answer is if anybody knew, then everybody would know, and you would too. The ugl's do not put up 'Going Out of Business' signs and announce to everyone they are getting ready to shut her down.
All you can do is watch for the signs that the other failed and bailed ugl's have shown on their way out. As those signs start to appear, the other members here will be calling them out in the sources thread.
In other words, read the last 20 pages of the thread and see how things are going. But ANY lab at ANY TIME can bounce, and most all of them do so at some point.