Automattic

INN Labs

This WordPress plugin gives site administrators a way to insert widgets such as ads, newsletter signups, or calls to action into posts at set intervals.
The plugin registers a configurable number of widget areas.
The plugin can programmatically insert these widget areas into posts when the page is rendered. This setting can be overridden on a per-post basis via a post meta box or a filter.
If the programmatic insertion doesn’t work for a particular post, users can choose to place specific widget areas at specific spots in the post using shortcodes or blocks.

Super Cool Ad Inserter Plugin

This plugin enables the insertion of widget areas in your post's content via programmatic insertion at display time, via a shortcode, or via bloc …

ezoic

Ads.txt Manager is a free way to manage, update, and easily maintain your ads.txt file. 
Save time by eliminating manual file updates and authorize sellers to ensure you have the most up to date file possible.
Free, Simple, & Easy 
Ads.Txt Manager is a free tool designed to help sites easily manage their ads.txt files by providing step-by-step ads.txt setup, management, and validation (and it will always be free).
Easily authorize sellers, update files, and validate your ads.txt before publishing. Save time and ensure that Ads.txt implementation isn’t causing you to leave money on the table.
Visit <a href="https://adstxtmanager.com/" rel="nofollow ugc">adstxtmanager.com</a> to create your account now!

Ads.txt Manager

Ads.txt Manager is a plugin to help WordPress sites easily take advantage of the Ads.txt Manager service.

Super Cool Ad Inserter Plugin vs Ads.txt Manager