They are paid to do so. In the bottom the that article, it...

They are paid to do so. In the bottom the that article, it mentioned: 

"Pitt Street Research work is commissioned by the listed companies it covers, and Pitt Street Research has received or will receive payment for the preparation of such work. Please refer to the bottom of the research notes as published on Pitt Street Research’s web site for risks related to the companies being covered, as well our General Advice Warning, disclaimer and full disclosures. Also, please be aware that the investment opinion in this report is current as at the date of publication but that the circumstances of the company may change over time, which may in turn affect our investment opinion."