Is this a legal thing to get a merit? I read some posts about redtrust given for merit. I am still not very clear on the giving of merit to the contest. Please give me a reference so I can find answers to my questions. regards
That's for merit trading, merit buying, or other kinds of cheating on the merit system. These contests/giveaways are aimed at giving merits only to quality posters, exactly what the system was supposed to do.
Merits should go to quality posters, instead of Shitposters and, sadly, it seems like these giveaways/contests are the only reasonably effective way to achieve that.
So, if you want to give away merit, but want to avoid red trust, just don't sell it, trade it, or anything else. Also don't give merits to non-qualitative posters.
As long as you send your merits only to quality posters in your contest/giveaway, you should do fine!