Instagram.
The point of content creator rank is for cube to gain more popularity, there is 2 ways they can approach this.
1) on the discord then "Dream" a youtuber with 16million subs has the content creator rank, he has never made a video on cubecraft, the reason he has it is because the Admins thought 'if the kids notice Dreams on cubecraft then they too want to play on it'
2) people want to grow a community alongside them, alongside cube for example 'team termite' this will encourage a smaller community to souly play cube as its what there community does.
Instagram,
First off I hate Instagram, what are people going to post? Pictures of a square? No
There is no way cube will gain any traction from some person with 1000 bots following them