We believe that in order to post a back link - the page should not contain more than 50 Outbound Links (OBL) and should have less than 25 Inbound Links (IBL). This will create good quality and allow the links to live with higher quality - for longer.
Remember, we all age - so do back links. After a few years, only a few back links are going to "age well" with the changes of content and searches. That's why you must always continue building quality, year after year to be AND STAY - PAGE 1.