I (Tom) will only review or post about a meal if (i) I ate as anonymously as a ninja; and (ii) paid. Simple.
What this means is that I won’t review anything I get for free or anything where I am recognised as a blogger (not that hard obviously and especially true now we live in Seoul). This is not to say I haven’t or won’t go to free things. I just don’t review them. If they are good (see here for example) I may well go back, eat anonymously and pay and rave appropriately about them.