I think it's still to little data collected to make any estimates but so far it's growing very slowly on most sites. Once again most of downloads came from SS. It's almost 90% now. There is no much downloads from others.

SS      87.34%
StockXpert      5.20%
123RF   4.83%
DT      2.11%
IS      0.53%
FP      0.00%

Overall is almost 40% higher than in previous month. Most improvement comes from StockXpert.

I think I got en enough data to show which site are hardest to put photos in (number of photos accepted in a month):
FP      1464
123RF   1120
StockXpert      624
SS      528
DT      283
BS      58
IS      18

I also upload to CS, BS and FT but it seems like these site would shortly fall out from my upload script. FT got very bad UI for handling large number of photos plus only 5 DL in 3 months. CS got one of the best user experiences but no single DL in 3 months. BS got ridiculously slow reviews, upload limits and 1 DL in 3 months.

I am still going thru my archive. Uploading is done with a script overnight.  Selecting and keywording takes 2-3 hours 2-3 nights a week, mostly on weekends. On average acceptance rate is around 40%

FP   97.83%
YAY   95.75%
123   62.96%
BS   42.46%
StockXpert   40.38%
DT   39.80%
SS   28.90%
IS   21.10%
FT   12.13%
CS   11.29%

As little as possible, mostly directly in LR. These are mostly my travel and nature photos so I do horizon leveling if needed, sometimes fill light and of course most time consuming dust removal. If shot RAW I might change white balance.