More particularly, this rule on rules on Alternate cryptocurrencies
[1] board and its sub boards not on gambling related boards. Although @theymos maybe global mods (@Hilarousandco) can enlighten us about this as well. Here are one of the cons breaking the rules.
That is very much
not allowed. The threads are trashed, the poster is banned for 60 days, everyone who participated is banned for 3 days, and everyone who participated cannot display a signature for 30 days.
[1]
Incentivising posting within one or more threads is not allowed