Things to consider
There’s a couple of things to consider before trying to get your work featured on any of the sites on the list.
Is it a good fit?
For example there’s no point in submitting a art post to a Instagram account that only post photography content, if it doesn’t fit, don’t bother. Some pages even have guidelines how to submit your work, make sure you read them so you don’t waste everyone’s time.
Be aware of fake pages
Some accounts that offer (paid) features have thousands and sometimes millions of fake followers, they have bought fake followers so their account should seem popular and artists should be more inclined to order a feature from them.
Be cautious if a page has low quality content & posts, low number of likes on each post (if a account has thousands of followers their posts should have plenty of likes), fake and odd comments on posts. (can be hard to spot) or if the the cost for a feature is really low (I seen a account with 1 million followers just ask for $10 to be featured on their account, getting a feature on a (real) account with 1 millions of followers will cost you 1000s of dollars.)
I only list reputable & establishes pages in this list. But always be cautious if you decide to buy a feature on any Instagram page.