the VYB rewards-pool smart contract has just been updated, to ...
double the rewards-pool rate
from 1/3 the full rate to 2/3 the full rate
(the full rate will commence in about 2 weeks)
double the voting window
from 2 days to 4 days
[1]
why the changes?
the rewards-pool rate was started at 1/3 the full rate to minimize any first-voting surprises (initial votes can be skewed upward if it takes a while for stakeholders to start voting)
those first-voting issues have stabilized (votes are now worth about half what they were initially)
the initial 2-day voting window was meant to [1] encourage folks to stay current in viewing and voting new content, [2] allow early authors and curators to stack some early VYB more quickly, and [3] provide quicker confirmation that everything is working 'as expected' with respect to the rewards-pool
everything seems to be working as intended (a big 'thank you' to 
a 4-day voting window seemed like a good transition on our way to the standard 7-day timeframe
also, delegation is coming soon ...
delegation will be enabled shortly (i.e. within a few days)