How would the DAC make money? These IFTTT (if this then that) services are free I think (someone correct me if I am wrong). I don't think anyone would want to use this service for usual web stuff if they had to pay for it when they could use the existing ones that are already free.
Where this may work though is for IFTTT services specifically within BitShares and between different DACs. example:
If n people that I follow on PeerTracks purchase an artistcoin
Then purchase x amount of same artistcoin
or
If daily Google searches for BTSX crosses threshold y
Then sell any artistcoin owned that have not received payouts for x days for BitUSD
Then buy BTSX with BitUSD