Snapchat is designed with an active interface which simply conveys that users are not provided with a feed which scrolls incessantly and then frequently provides random contents. Users only need to open the snaps that they wish to view.
What is more, there are no comments, shares and even likes in Snapchat. So, this solely means to say that there is no approach for users to immediately re-share their content to other users they know.
At Snapchat, there is no automatic metric feedback which users can utilize. In a nutshell, some feedback is unworkable to obtain while some can be manually measured. In the same way, there is bunch of suggested users here which you can just add. For you to add some users you know, it is required for you to add them manually by name. Alternatively, you may need to wait for the people you know to add you.
Likewise, it is also quite difficult to determine how many Snapchat followers you have. So you need to do some math thing and use tools to somehow estimate this.
Indeed, these distinctions may appear very inconvenient as compared to other social media networks out there but a lot of them shall absolutely be beneficial to you.