I can understand that. Then what is the good way for participating in this campaign if likes,comments etc are considered low effort tasks then the campaign shouldn't even exist...
Don't participate in the campaign.
It
shouldn't exist. But moderators can't get to these campaign threads immediately, especially since there are so many. I'm not sure how he handles it but sometimes moderation won't start until a good couple days after a thread has started. And in that time, plenty of participants could enter.
It's on you from now on to watch out: don't expect everything to align with the rules.
Just did a double-take and saw that the campaign was in BTC. This is kind of a weird one, because it's not really an altcoin giveaway. But it does promote zero-value posts where they could be submitted on an external page. So I'm not sure.