For example of one of my post here: https://bitcointalksearch.org/topic/m.29247505 (I never mentioned that I will merit those who help me).
Like if someone can help me I will merit him. Is that allowed? Or is there a chance that someone who does that will be tagged a Negative Trust because of paying sMerit instead of Bitcoin/Altcoin?
sMerit should not be given as a form of payment. Merits are created to appreciate, or commend someone for posting a useful information. Yes you can still give sMerit to someone who have help you with your problem but that should not be in a form of payment for the help offered. It is best if you can offer payment in btc / atlcoins, and it is up to you to give out sMerit for the Job well done. After all sMerits where created to promote good quality post not for any payment source or scheme.