Any plans for new exchanges?

If I understand correctly
Smaller the Amount you stake, lesser the probability you will find a block in a short time.
One will get rewards anyway but if one doesn't stake for long enough time, he/she will not find a block and no block means no rewards. Opposite to this, if one stake a smaller amount for a longer time there is more probability to find a block in a long time.

Two ways to make it happen ( in both case probability to find a block is more),
1: Stake smaller amount for a longer time
2: The Larger amount for short time

Remember this is like SOLO mining, the larger hash rate more the probability to find a block alone.

The calculation is for staking 1000 CUT

Minting POS block within   1 day     3 days              7 days        31 days             90 days              1 year   
Probability (%)                    1.54                4.55               10.30             38.22               75.29              99.63   
Reward                         4.55 CUT    13.63 CUT    31.71 CUT   138.15 CUT   385.38 CUT   1292.92 CUT

In the table above, it says person staking 1000 cut will earn 4.55 coins a day but Cut coin block reward is 300 coins/block. This means one has to wait for almost 66 days to get a full block reward.

This is the reason for many people complains that they have not got any rewards even after staking for days ( this may happen due to low staking amount)