Muslims are familiar with differences in opinion regarding matters concerning their faith and shariah compliance standards are no different. Covered here in further detail, Zoya determines compliance based on the shariah standards established by AAOIFI. Other institutions have different standards often based on different ratios and thresholds established by their respective shariah boards. Given that they are reputable and have consulted with accredited scholars, it is considered acceptable to follow them.
It should also be noted that shariah compliance thresholds should not be taken too literally. These are meant to be guidelines, and it's good to remember that.
Ultimately, it is the choice of the individual investor as to whether to invest or not. Zoya is here to provide information and allow clarity for when you make these choices. As always, Allah knows best!