Word-of-mouth advertising
Property owners who market their property via
your web site and see good results are likely to recommend you to their
colleagues. Thus, more and more owners will want to be listed on your
web site. The more owners you have, the more money you earn.
Likewise, those who reserved a property via
your web site and liked the ease and availability of online service are
likely to recommend you to their relatives or friends. This is a good
alternative to just giving your phone number. Via phone, you cannot
show property photos and very often cannot check immediately the
availability of the property within the specified period of time.
The word reserved seems odd to me here. What's wrong with bought?