1. Avoid Bubble posting:
I have seen users making continuous posts without any time gap just to complete their weekly Target for bounty campaigns or even signature campaigns, this can get you flagged and there are chances you will be removed from campaign and be in the spammers list thus eradicating your chances of being a part of further campaigns.
Completing campaign posts is not a reason to fill the forum with junk. Campaign managers consistently monitor the posts of participants so such a person will be removed from the campaign. There is a need to plan how to maximize your time in the forum to enable you to contribute meaningfully to the community. If you are been paid for the services, then you are required to give your best. Writing useless posts will not also lead to the member getting merit which will also affect his chances of being selected in campaigns.
2. Trading of merits:
Most of us will receive a random DM by users offering exchange saying they will share a merit to your account from their alternative account and ask you to share merit on their account. Never indulge in this activity as moderators can easily identify it and your account may be blacklisted and sometimes newbie are cheated on this context as there are group who will ask you to pay for merit and end up running away with your money once you pay it.
Trading merit is against the forum rules, so doing such will have severe consequences. Although I have never received such messages but I will distrust any member that sends such personal messages to me.