Why write "FBP" instead?
Because it implies a customary arrangement and automatically answers lots of the questions without the verbosity.
Kind of how merchants in meatspace will say "OAC (On Approved Credit)", which is shorthand for saying "We are making you an offer, but it is contingent upon us checking your credit history and determining that you meet our creditworthiness standards, and if you don't, the offer is null and void". Or "FOB Shanghai", which is shorthand for "Title to the goods passes to you as they leave Shanghai, so if anything happens to them before then, it's our problem. Anything afterward, is your problem."
"LASTR" would basically say, in one word or less: plan on being given a fair MtGox spot price any time other than when the market is having a stormy day.
I'm not looking to invent unnecessary alphabet soup, but there needs to be a way to quickly differentiate merchants in the list who accept Bitcoins (but it's not worth your while to bother, because you're going to get the worst possible exchange rate for them, e.g. LIQ), versus ones that like Bitcoins because they "save on taxes" so they will give a discount, (i.e. CASH).