I’m one of the participants of that easter giveaway but I never won on that twitter contest for my whole month of participation. Most of the users that typically won on that event are dummy and probably multi account that only use there twitter to participate on giveaway which is why its very hard to win on any contest that launch on twitter or other social media channel.
That's unfortunately a sad reality of crypto. There will always be some sort of people who will have multiple accounts and considering how much you could earn with having multiple accounts everywhere, I doubt that it will end anytime soon, it will probably take a long time.
I have once met with a guy who had thousands of reddit, twitter, instagram, telegram etc etc accounts, it took a lot of work, like 12-16 hours of a day of work, but when he got a job he got paid a bulk, like you would pay to a lot of people, but all by himself and that meant if he got just 1 job per month (he got more) that would make him rich enough, so it is a real work and still shady at the same time.