I think you will find that owners of properties in Pollensa especially really do not need to make up their own feedback as you have implied. The majority of owners go far past what could be considered the norm to ensure that their guests are happy with the accommodation. You will see from many posts on this forum that BR and VC both receive very good feedback. Another good indication is that many of BR apartments are booked from year to year.
I too do not own an apartment in BR but I do own a villa in Gommar. Today I received a call from someone interested in renting in July. This person refused to provide me with their phone number and had withheld their number! Sorry - if I can't be trusted with a phone number, I certainly would not trust that person with my villa! - works both ways!