Tumblr also offers sponsored web post ads, which are pieces of Tumblr content crafted by advertisers that appear in users’ main dashboard feed, integrated with normal, user-generated content. These Tumblr ads have small dollar signs to mark them as advertising content. In order to post your online ads onto the Tumblr platform, you'll have to become a Tumblr sponsor.
Domesticsale is a free classified ad site that lets you post ads for free in many different categories. The categories range from real estate, events, sale and services, garage sales to jobs and resumes. You also have something called easy store for fun, vacation rentals for travel and the option called free stuff that lets you upload pictures to create an ad flyer like, car sticker, board ad, sales sign or desktop wallpapers for free.
Since guest posting on a popular blog allows you access to an established audience and high domain authority, this practice can sometimes be more beneficial than posting to your own blog. Plus, you can link back to your own website from your article, giving you an inbound link that boosts your domain authority and can increase your own website's ranking in search engines.