I am sure Op is looking to buy those 10 full member accounts for joining yobit campaign and spam the whole forum.
I don't think he is going to use those accounts to join yobit campaign. He will have to make 200 posts per day with them and even if a single post takes him 5 minutes then making all those 200 will take him almost 17 hours
Either he is purchasing accounts to join altcoin campaigns which have no participants limit, requires less no of posts and doesn't even care about post quality
Or he wants to stock accounts from now to participate in future giveaways. Heard about a user abusing primedice bingo competition with 30 different accounts ?