Rebate on hidden orders

Hi

I switched to cost plus with IB and it comes quite a bit cheaper with US stocks. Yet, although I trade them less often, with higher commissions, european trades end up representing most of my commissions, and as the volume on some stocks is quite low, i often use hidden orders.

Are hidden orders considered as removing or adding liquidity ?

As well in the US, if you show 100shares on a 1000shares order, how is it calculated regarding adding or removing liquidity ?

Thanks for all input
Luis
 
EDGA charges for hidden orders
BX charges for hidden orders that add
BYX charges for hidden orders that add
EDGX it looks like gives a full rebate for hidden
BATS gives a $2.00/1k rebate on hidden instead of $2.70 on displayed
NSDQ gives a $1/1k rebate on hidden
Don't think NYSE charges any differently (regular rebate)
ARCA it looks like doesn't charge any differently (regulare rebate)
PHLX gives a lesser rebate, around $1 I remember
 
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