I own a hostal in Cantabria, Spain. An onlineholidayhomes.com employee called me to offer me an annual pack of €175 that included customer reservations and other services.
I paid them AND I NEVER HEAR FROM THEM AGAIN.
They did not respond back to my emails or calls.
They're scammers. They call owners of vacation rental houses and hostals, they promise that they will take people to their establishments, but it's a LIE.
On their website they have a list of inns and rural houses in Spain. If you call the owners, you can VERIFY that many of them have already been scammed or have never heard about this company.