I've had loads and, at first, lost loads as well. Sometimes you lose and gain in the same hour so it appears static.
I'm gaining one for almost every post, I would not say it was one for every two posts but it is like 3/4 for every post I think.
Why was I losing them and now am not? This may seem crazy but I've tested it over the last week and it does hold true as far as I can test. Which is much easier now that these things come in only ones and twos.
You *lose* either half, 3/4 or even a full thingy (can't say for sure as I have stopped losing them now) for every post with the words P****T/P****TS in them!
Now I haven't posted this earlier because I can't be 100% sure and people will undoubtedly tell me I'm wrong but it is really working for me. When the thingy system changed I was losing loads, posted in the forms about losing them, lost more. Now have not lost a single one for 5 or 6 days and that is the only change I've made.
I'm gaining 5 or 6 a day which is moving me up the table.
Of course there could be other keywords that lose thingys as well.
EDIT: should add that I don't think you can gain loads by spamming, probably limited to one or two an hour, but I don't post that many anyway. It could be that one is awarded for participation during that hour. Anyway...