What will happen to my Reach

I have a 50k fan page what will happen if i use a auto like service i mean when every post to your fan page will have 300-700 likes instantly will you think my reach will be more higher with this kind of service or still the same nothing an usual? anyone has experience using this kind of service to make your rich higher? or this is bad for my page

If for some reason they demote pages with fake likes, folks will simply buy likes for their competitors. I think they just ignore the likes when they detect fakes.