what is your oppinion about the chances to win in gameminer and here?

Math.
Edit: There is no such thing as luck!

The odds are purely based on the number of entries for each giveaway. if you flip a coin 10 times you have an equal chance to get 10 heads, as you do to get 1 or none, its all about your personal luck against that of the other entrants.

You are more likely to win a giveaway with less entries, mathematically speaking the percentage is smaller. In the other hand if you enter a giveaway with only 100 entries you have 10% to win which is not much, if you enter one with 10.000 entries you have 0.1% to win and so on. It's like crates in TF2, you have 0.66% chance to unbox an unusual hat which worths several times the price of the key to open the crate, its a frigtheningly small chance. (I've won 4 gifts on steamgifts, all of them were below 700 entries) However everytime I enter a giveaway I think to myself "I have just as much chance to win as each and every person in the giveaway"

Well you need an invite to that site, so F that site. :P

I won a game on Gameminer before that I win one on Steamgifts, and I had registered on Steamgifts long before.
I guess Gameminer is not as popular as SG, so there are less entries.

70+ giveaways entered, 1 win. Now, if it cost me money to enter each giveaway, not just the Contributor Only ones, then I'd complain about the odds, but it doesn't so it doesn't matter how often I win.

853 giveaway entries, one win, and that was back before 50 entries, never tried the other site so im not sure if id have better luck, but maybe im entering int he wrong way here, or just unlucky XD

I've won 3+ times as many games on SG as I have on GM.

SG entries to wins - 9997/70

GM entries to wins - 7879/20(2 of which were fake/not received giveaways)

Since I can't speak/read Russian, I also find this sites community and forum a lot more inviting.

There's also the fact that GM has a forum solely dedicated to the sale of entire Steam accounts, which I don't agree with...