The handmade, homemade, without preservatives ones went first.  These love letters were next.  Luckily, (and strangely) the urge for these stuffs come once a year, i.e. during the Chinese New Year.  Just like Bak Kwa, Kueh Lapis (an ultimate fattening 45 egg yolks recipe here) and White Rabbit milk candies, though they are available whole year round, we only eat them in the beginning of the year.  Which is a good thing, I guess.