Tell me please
Read this https://bitcointalk.org/index.php?topic=1638614.0
However they say its better to do signature bounty and you might try this path too.
It might be better to look at the previous run, since those prices are already known
https://bitcointalk.org/index.php?topic=1628112.0
Quote
Slots BTC/Slot Person
1 1.20 Randian Hero
3 1.05 bit.news
2 0.75 wings.ai
1 0.50 CryptoCamel
1 0.40 Bitcoin Gambling
1 0.35 CrazyCraig
1 1.20 Randian Hero
3 1.05 bit.news
2 0.75 wings.ai
1 0.50 CryptoCamel
1 0.40 Bitcoin Gambling
1 0.35 CrazyCraig
So basically, you could get a slot with a 1/10 chance of showing your add right after the OP of every thread for 7-9 days could go for 0.35BTC (if you're lucky)