Social Signals comparison

Hello.

I have used social signal services for my sites from BHW marketplace. Those are at least cost $10 per url. But recently I bought few social signals from seoclerk for $1, $2. I tested them and signals were never dropped.

I am curious that why we should pay about 10x. What is the difference between these services in the context of seo?

Depends on the seller and so on. Some social signals have more value than others. If I recall correctly, there was a thread/case study a while ago by @Leith about sending backlinks to social signals from Twitter that seemed to indicate that those signals were more valuable.

Or it could just be markup from people who resell the exact same social signals off of Fiverr.