I just checked my numbers on the Estimator 

I started uploading to istock in January this year.. I only have a tiny portfolio (100).
As an exclusive, I can look forward to earning 79% of what I earned Jan-Oct during the next year...    If I don't go exclusive the figure is 63% for the next year.

I might as well just stop uploading all together. 

You got my vote.

My 7th and surprisingly my best month.

SS   46% BME thanks to two EL and despite no new uploads
IS    45%  DLs down 2%, earnings up 12%
123  3.5% BME
StockXpert 3%
SV   2%
DT   0.5% WME

At least in seems as if MP are willing to remove the impact of votes on the index

http://www.mostphotos.com/forumviewthread.php?thread=1049&page=2

where Arian says

"I suggest for the voting to still be ... But that it wont effect the index. . a lot of members here actually enjoys the votings. It is a part of the community. But like I said I suggest we remove its impact from the index. What do you guys think of that?"

Although it doesn't solve the problems with no reviewers....

May was my 5th month in microstock.

IS       61% (20% drop) Reached 250 and got my first flame.
SS     16% (12% drop)
123rf   5% (up 12%)
FT       5% (50% drop) steadily down since my first month with them.
DT      4% (30% drop)
FP      4% (up 50%)
StockXpert    3% (50% drop)
BS      2.5% (40% drop)

Here's what MP's Arian had to say in the MP forum:

@Mostphotos are for the moment putting all its efforts on advertising in the Scandinavian market.

To be honest the crew are working like crazy to increase the revenues, and the only obstacle that we face from buyers is that they need to see more photos on the site. Else they love the site in every aspects.
So at the same time that we are working with sales, we are putting efforts to get more photos to the site.
Sales and and the number of photos goes hand in hand. Mostphotos have as of today approx 220 000 photos online and the goal is to have several millions. We are working really really hard to increase the sale figures, trust me.

What the site needs from the contributes is for them to do their part, uploading more photos.

It has a lot of stray pixels around the guy, especially along the back and around the head. Fotolia would surely accepted it. You might want to clean it up for SS.

I have also noticed that you can get any attempt to isolation accepted at Fotolia.
It is everything else they reject...

SS 36
IS  31.5
FT  9.5
StockXpert 8
SV  4.5
DT  3
Scan 3
Cre 1
BS  2
123 1
FP  0.5
LO  0

For what it is worth. It is my first real month on micro. An average of 88 pics in the portfolios with a per image result of $1.26 for the month. Now if I had 5000 in my portfolios with the same result, I would be pretty happy! 

I live in the UK but unfortunately I registered on the US site (didn't know there was a UK site...). I wrote Fotolia and asked if I could change but nope, can't be done -- maybe they would have let me change if I had been in the US and had registered for a non$$$$ Fotolia...

I've only submitted 2 flower pics but they were accepted by all (SS, IS, StockXpert, 123rf, DT, BS and others) but Fotolia (took one only).

Both times I thought they would be rejected so you just never know.

Since I uploaded them in January I have only had downloads at SS.

I joined there last month and only got a small portfolio (86).
About 7% rejection but funny enough all but 2 of the rejects were accepted at IS and SS.