In Sandra_hakeem's case, she's been here almost a year but hasn't even made 120 posts. That just isn't going to cut it--if you're looking to rank up, that is.
In one of her previous posts in this thread, she mentioned that she has been active every day for the last 3 months. I thought she joined the forum 3 months ago. But after reading your post and taking a quick look at her profile, I just noticed the registration date.
Quantity doesn't necessarily mean quality, but if you manage to combine those two elements, you are more likely to get showered with merits than someone who isn't here that often. People read what is current and you should be part of it somehow for optimal results. Since you brought it up, Sandra hasn't made 120 posts in the whole year, but there are members that write 150+ in a month.