Upside for us is free miles. Downside is that highly rated restaurants rarely participate in idine.
Upside for the restaurant is new customers. I suspect that since business travellers tend to spend more (expense accounts and all) that idine sells the restaurant that the program will be cash positive for them.
I registered my cards with idine and occasionally I score miles from it. But, I never choose a restaurant based on idine participation. If I get the miles it's pure luck.
My preference for choosing a restaurant is based on the review from
Zagat
[This message has been edited by doglover (edited 12-28-2002).]