The problem is, whilst they may be sending a lot of traffic, for the most part it is worthless unless your sponsors offer up localized tours and/or join page for Spanish speaking surfers.

There's a reason these guys are pulling the galleries from sites not submitted to them, because nobody is submitting to them because the traffic is perceived to be unbillable.

Much like traffic from those Japanese leech/hotlinking sites, unless you are actually making sales from this traffic they are sending you, its actually costing you money.

Regards,

Lee