@FiXato There is really nothing new. All problematic points had been identified long ago.
The main issue I had is that the resource needs grew 20x in a week or so.
The way I scale things, I always leave room for a 4x growth but could not expect or afford to have extra resources for a 20x needs.
But yes, on the tech side nothing surprising came out of the growth, just add more RAM+CPU really :)