[Yugocean]

Whether you are a freelancer or a business, you must consider free promotion of your product or content. How do you promote your YouTube video for free? Or how do you promote your affiliate link for free?
This is the wrong idea.
You can earn something from your Adsense affiliate link only when its advertisers pay money. You expect money from them, so don't expect your promotion to be free. If there was good publicity for free, then those companies would also save and not spend on advertisements.

Similarly, if you want to promote your product, shop, content, website, etc. for free, then it will be considered spam everywhere. You will not benefit from this.

[augusta]

Spamming anywhere online isn't acceptable it is good for one to always avoid spamming even ones ref link to avoid it's removal and no money will he made

[Treborika]

It's evident that in this today's world there is no free things. You have to pay for almost everything online. In the past, Facebook accepted users to advertise for free but now they are have something called paid ads.