Is this thing allowed?
It's a bit tricky. Based on the "SS", it doesn't require users to post on that thread (somehow it stays within the rules [unfortunately]):
15. No on-forum altcoin giveaways.
[6][e]15.
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Specifically, you are not allowed to give people any incentive to post insubstantial posts in your threads. You can't offer to pay people who post their addresses, usernames, etc. You can do giveaways off-site and link to the giveaway page in a thread, but you can't give people any bonus for replying to your thread.
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Regardless of that, such behavior is equal to buying merits (
ToTheMoon_XOM9IK should be tagged).