My view of bubble tea is that is while it definately belongs to the tea-fi thread I am more interested in traditional teas. For the record, I am not asian, tried it, and nearly choked. Definately something to put in the acquired taste category in my opinion. Like music, to each his own.
My view on the first steeping is to never drink it. I have not thought to use it for washing out my cup (but I do warm it, don't want to shock my tea!) but using it to wash the leaves from anything residue left over from the processing and shipping steps.
I became good friends with the manger of my local tea house and he had taken tours of tea processing facilities overseas. He said the places got pretty dusty. It is also rumored
that the swept up tea on the floor is used in tea bags. Another reason to buy expensive tea.