Instagram is full of tease pron. It’s one opinion. I can see where it came from after hearing it for the first time. There appear to be a lot of female users on there that use it to offer taster content in the hope that you will follow through to their paid links on Patreon, Only Fans, or such premium sites.
The posts push the boundaries of what is allowed on Insta. Simulated acts, revealing outfits, teasing questions. Nothing too graphic, but close. Some maybe too close resulting in account bans. The need for multiple backup accounts just in case you cross a line.
Memes are used to try to encourage more likes. Plus cosplay, roleplay, gaming, and product use. Anything to get more followers in the hopes that followers convert to paid subscribers. Masters of tease.
With hard content requiring full-on identification verification, accessing soft content via Insta is becoming more popular. Just use your imagination.