They're effective for me but I don't own Playtodos.com...
Seriously though, there have been several campaigns that have ended (e.g., Primedice, CryptoVPN, DaDice) and cited a saturated market or too much expense for the benefit of advertising via signature ads.
Don't be worried about the campaign's effectiveness - these business owners know what they're doing. And when it doesn't work they're not going to wast their time paying people to advertise.
Don't forget Rollin.io, they closed their signature campaign last month due to not enough direct business from this Forum.
Keep the post constructive, kids, otherwise these campaigns will just be history...
Rollin.io running fixed signature campaign which is different payment method if we compare DaDice or Bit-X ( pay per post scheme )
Ofcourse it will effective if signature campaign using ppp scheme.
If you say signature doesn't effective, why we still can see PRC,FJ,Victor,etc still buy advertise slot on Auction..