PPC Marketing (Google Adwords, Yahoo Search Marketing)

[Hostels]

Are there any hostels using pay-per-click (PPC) marketing like Google Adwords or Yahoo Search Marketing?

If you are using PPC advertising, do you track conversions?

I wrote an introduction to using Google AdWords for hostels -- what I am most interested in is whether people are using conversion tracking to monitor how much money it costs to acquire each booking through Google AdWords and Yahoo Search Marketing.

For example, I've seen hostels that spend between $2 and $80 to acquire each booking through PPC ads. If the hostel is spending $80 to acquire one booking then it's not cost effective. Conversion tracking can help avoid that problem, but it seems difficult to implement conversion tracking with some of the booking engines.

If you are using PPC are you using conversion tracking, and how are you implementing conversion tracking?