Should glossary links be used as much as possible? There are two terms in my thesis that I'm using throughout the entire work. They have been added to the glossary for that reason. However, by the time I got to chapter 4 or so I've stopped writing them as PDF hyperlinks (so that they can jump to the corresponding entry in the glossary) because I got really tired of it.

My assumption was that by this point the reader should know what the glossary terms mean.

Is this okay or should I use glossary hyperlinks as much as possible?
Actually, I question the value of hyperlinks at all. You are assuming that the reader will be using a specific technology to read, rather than just a printout. 

It is really enough, in my opinion, to refer to the glossary at the first use of a term and forgo it thereafter. If the reader is aware that there is a glossary, they can go there in any case if they are puzzled. 

The links will interrupt the flow of reading in any case. There is value in making the work beautiful, not just informative.