This service worth it ?

For $19 you can't expect much.
 
its good @19 but may not be worth to put them to your money website. He is talking of 20 PBN post also; seriously you are going to get a link from heavily spammed PUBLIC blog network. so do it on your buffer web and not main website
 
read more about seo and about your level the site is then think what to buy
 
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