On escapenow.tv you you may monetize your Private Instagram account by selling access to it.
In order to set everything up, please go to Profile -> Settings.
Enter your instagram / snapchat profile link & enable subscriptions.
Subscription packages are predefined
Once you enable, subscriptions, you can see the links being displayed on your profile, you can now start promoting your profile link for subscriptions
e.g: Subscribe to my private instagram on escapenow.tv/yourprofilename
When users start subscribing, you can check creator analytics (snapshot given below) & social tab, here you will find a list of subscribers (with their usernames) who have subscribed to your insta/snap & till when.
Next go to instagram & create a private group & add the usernames you see on your social tab. Make sure to announce on group the frequency of content to avoid unwanted spams. Set the expectation right.