Is it only me checking this withdrawal screenshot? Why won't there be any suspicion?

- You deposited on the 13 and withdrew on the same day double your deposit

You then deposited twice on two separate occasions,which is ok then requested for another withdrawal about one month later-

Your first activity of depositing and withdrawing the same day is suspicious to me alone. . Most people won't withdraw everything so as to continue betting but we don't know your own side of the story.
Also, we don't even know your mode of activity in this site that made you to be flagged.

If I can detect just this, what of a full system algorithm that detect fraud/ suspicious activities?

My advice is to wait for the result of their investigation. If you are clean or blameless, you will be paid again.

From my perspective, fairspin is not a scam!

You were paid before, you could be paid again. Just wait!