'Epay' will come out high on the rating list for any search on 'goggle' without any help from anyone in particular.
So, I never promote them, as a matter of principal. Further, a reference to 'big river', for instance, will mean that your posting may not necessarily show up on a search of that site. Particularly useful, if one wishes for anonymity rather than being read by all and sundry.
They all collect information on everyone that references them. I don't want potential advertising rubbish arriving in my mail.
Think here of loyalty cards. They know what you buy, where you buy and when you buy. They can then pass on this information or bombard you with 'offers' that you can do without, as they have your buying profile on record.
Think twitface, where the nasties might note that your house is 'ripe' for a 'visit' because the member had stupidly advertised to the world and his dog that the house is likely unoccupied – and had left markers for its address.
A recent example was that of an eye test I had recently. I did not actually absolutely need a new prescription, so did not purchase a pair of high-priced specs at the time. I later was offered any pair at half price by the outlet. That happened to be a worthwhile offer, as it happened! But it does demonstrate that they had me on record as having had an eye test, but of not buying their over-priced spectacles! I expect they still made a healthy profit, just not a real 'killing' at my expense!