I've checked a few highscore tables at the time the trophies were given out, and basically, on many of the not so popular games you got a trophy for just sending any score at all because there were not many people playing.
I had planned on trying out for Itchy Invasion because I think that trophy is really cute (my fav is silver
![Wink ;)](./images/smilies/icon_wink.gif)
I really wish I'd used those 15 minutes to play as many games as possible instead.
Also, most likely due to the new Aaa challenge scores reset before midnight, so most likely scores you send in between that and midnight also counted...