is it worth for travel site owners to sign up with this network?
Crap. They "forget" about some of your leads (e.g.: don't pay for it, you have to remind them), their interface is from stone age (you have to create separate accounts for each site you own, and log-in separately), they don't pay by Paypal, not even Wire (!), you get cheque...
Try Hotelscombined.com or Booking.com instead.
What do you mean exactly?
in adsense ads, we can edit the text colors and etc..
how about in Hotelscombined.com, can we edit some of their ads?
that's what i mean, can weedit it like it will display list of hotels in our city?
or i probably just don't know how, can you check my travel site's ads if the list of city's in the Hotelscombined.com's ads displays some cities in our country?
cebu travel guide
hope it's not considered as spam.
Hotelscombined as the name indicates has all the hotel databases combined, so there are no hotels left out that have a deal with at least one hotel booking program. Yes, you can tweak their ads, and there are several formats. Just sign up and try them...
I did use expediaaffiliate.com for about a year, but I wasn't happy with the overall customer service. Their system is a bit weird. Payments are by check, but I have had delays in check arrivals. I am currently looking for an alternative affiliate program. I might give booking.com an try. It doesn't help to try and that is the only way you will be able to experience. An affiliate program that does not work for me, might work for you.
Best of luck.