DT $50-$150 - do we really get 50%?

Non-exclusives get 50%, exclusives get 60%.  You can find the info here:
http://www.dreamstime.com/sellimages

FT $3.30 - $16.50 (we set the price but still a bit low)

The commission will vary depending on your ranking (white, bronze, etc.) and your exclusivity.  I can't seem to find the minimum amounts anywhere (except for the white ranking), but here is the maximum commission for non-exclusives.
White (<100 sales) $3.30-6.60
Bronze (100-1000) up to $16.50
Silver (1000-5000) up to $33.00
Gold (5000-10000) up to $49.50
Special (>10000) up to $66.00

You can find the info here:
http://www.fotolia.com/info/tarif.php

Does anybody know if you can increase extended licences at FT in a bulk format as all my images are set at the default measly 10 credits?

You have to send a note to admin.

Does anybody know if you can increase extended licences at FT in a bulk format as all my images are set at the default measly 10 credits?

I had a nice fellow named Chad offer to do bulk changes for me (he stated that it would take a few days)... perhaps if you ask real nice   

Fotolia's customer service has gone to shits last month. They take forever to answer ANY messages nowadays.

Back to the topic: I have all my Extended licences set to $40 on Fotolia so at bronze that's $14 to me. Quite a bit low if you ask me. At Big Stock, I refused most Extended license options except for the ONE piece license (the one that allows reselling, but pays you PER item). I mean they are absolutely ridiculous: $20 to you for UNLIMITED reprints of postcards? $7 for up to a 1000 calendars (limited???)? Can you imagine how much dough you can make selling a 1000 calendars? I can, because I've done it before: for each calendar I netted $7. Not that I sold a 1000, but still. $7,000 possible profit and of that $7 going to the provider of art/graphic? Dreamstime prices are great, I wonder how many Extended Licenses they're selling. iStock's WERE good, now they've become Walmart. 123RF: great, $99, you get $49.50

Phil -  do you think by having your prices above the majority of others (ie at $100 compared to $10 or $20) you are reducing possible sales.

I am nearly at bronze with Fotolia and am yet to decide whether I will raise my prices.  Still trying to figure out who the buyers are and what they are willing to spend.

Do you have to opt in/out of 123rf extended licence scheme almost $50 sounds good.

Go to: http://submit.123rf.com/pgrapher_profile.php, scroll down and check the box "Include me in the Extended License terms". It's a flat 99 credit purchase, 50% to you (or 30% if you joined after March I believe)