For me August turned out t be a strange month. No sales for first three weeks then 5 sales on the fourth week. In the end I am still stuck in the 2-6 sales range but now with only 50% of the what I earned before. I would like to know others experience.

No sales as of yet from them. Large portfolio too (2500+ videos).

However, got several e-mails from them promoting their membership package.

I go months without sales. Got one last week. Not sure if it's a coincindence  but for me better 20 dollars than no dollars

It is far too early to tell...
...but my prediction based on many years of experience is that it will make no difference to sales volume and will turn out to be a cash grab, the same way as every other time a promising new agency pulled the rug out from under us.

not yet

Absolutely dry here. Worst than ever with a 5K portfolio 

My sales were 1/3 of normal on VB. I don't hold out to much hope for them.

I doubled my sales in August (compared to average), but sales in September are infinitely lower*.

*Disclaimer: average is 1 sale/month; august: 2 sales; september 0 sales so far. May not be very statistically significant

No impact, sales are super slow here.

Yes I have seen an impact. Sales from Oct 2015 -  Apr 2018 were great, almost better then SS. Since then it has been a noticeable dropoff.
I am returning less now then the first month I uploaded to Storyblocks in March of 2015.
Going off Septembers figures I would say it is 1/6th of the earnings compared to the average month in 2016-2017.

Sales were fine, actually. Not sure if it's a coincidence, overall the year was worse than last two years.

Yes, the impact is negative.  Selling about half what I did before the change.

Same to me.
More than 45 days without any sales.

Selling the same number of clips (4 or 5) earning half the cash.

Yes, no sales at all! Port size 4666 clips

One sale in 21 days.  Port size 3631. Totally disappointed...

No impact, still 0 total sales.

Never sold anything under the old structure. My port is only 200. No uploading since the new commission was announced. Sold two in the last three months. Beginner's luck?

I sent an email saying I would suspend uploads until I see an improvement