Number 3 looks good.   As well as 5 and 6.

When I saw 4 for the first time i didn't even realise it was an S. My vote goes to number 3, stylish and simplistic.

I would suggest limiting voting to only 1 vote, maybe 2 at most because then it is easy to see which logos are better.

Voting with one vote per user can produce incorrect result.
Consider the following example:
1. 30% prefer logo A but also like logo B and hate logo C.
2. 30% prefer logo B but also like logo A and hate logo C.
3. 40% prefer logo C.
Obviously logo A will get 30%, logo B - 30% and logo C will win with 40%. Logo which is hated by 60% of voters will win, 60% would prefer either A or B instead. This is why two-round voting systems are usually used to elect presidents (not the case for my country though where the same guy wins all elections).

Why can't you vote?

Maybe it is limited to member level or something.

i like this one

Like the style of 10. The style looks good.

I love the 4 but the 3 and the 2 are well too.

Elaborate.
how a color can be 'stupid'? It's not even a color combination, just single color.

3 is quite good, yet I'd prefer 4 as it's even more abstract, clean and resembles the 's' in spread likewise. what makes the 4 superior to 3 is the symbolism of the spreading waves that supports the 'spread'ing and distributed character. I'd go for another colour as well, that purple violet sheme sheds a bit too much of a naive esotheric flair which is certainly not the wanted outcome... and all that bevelish glowish 90ies effects are... well 90ies...
I'd go for a vivid green/black orange/black - flat shaded - version of logo 3 ... best practice: always use (as) basic (as can be) colours. see.: google colours

bonus would be 4 or 5 versions of the logo, each with another basic colour plus black (or white) as contrast/contour that could be displayed on a random basis every startup... one time the yellow/black then red/black, blue/black, etc. every other start, u get the pic.

apart from the colour 4 is almost perfect... some lighter colour, this and combined with some partial black outline to contrast wouldn't hurt either

I like #3. I think it's unique and more memorable than the others.