MicrostockGroup

I gave it a go but it didn't work for me.I am not sure in what way it could help?So I gave up.

I did a few. Didn't see any results. Won't do it again. 

Exactly.  Never give away your work, and forget the untruths about increased portfolio exposure.

 Did once never again doesn't work 

I tried it several times with different images, but didn't see any impact on sales

I've donated a few, and I might have gotten a couple of sales because of it.  Currently I have no images donated because the last go-round had zero impact on sales.

I started donating a few images a week,  back when the option first became available and I did notice a slight increase in DL's. 

But the last several months donations have yielded no noticeable increase at all.  If you check out the free section you will see why.  Thousands of images in there now.  It's nearly impossible for someone to find mine/yours. 

I still keep donating the same ones periodically, but not really interested in adding any new ones until/unless I see sales pick up. 

I barely squeaked to my second worst month of the year there in August.  Sales are dropping like a rock at 123 despite vigorous uploading. 

Could have been summer, but none of the other sites are showing such a big drop for me. 

Donated one of my images on DT yesterday (kk it was a rejected image) and it has got 78 downloads so far.   Not sure if it really helps my sales or portfolio exposure (got an email saying it might help the latter) but got 3 sales which were not resulted from searches ("n/a" for keywords on "My earnings" page)....