Does entering several GAs ending at the same time lower your chances of winning?

nope. i think you're referring to the holiday event giveaways. the giveaways are set to end at that time because that's when the event ends.

No.
Why would it?
They're independant of each other.

As no one besides cg knows if the algorithm used for drawing winners is true or pseudo RNG all answers must be inconclusive.

Have you considered getting SG+?

There is the event + Jingle Jam keys also expire at the end of the month/start of year. I imagine a lot of the giveaways right now are based on those factors.

Pure statistical answer: no
Pseudo-random computerish answer: you can't know (depends on the implementation), high likelihood of no

If you want to know more, google around "statistical probability" and "pseudo-randomness". If you're interested in math that is.

Edit: either way you cannot influence the outcome so don't worry and just enter for stuff you want to enter

Id say none of us have a way of knowing this for certain. Perhaps only CG knows the criteria used to determine winners .
But I dont think so, GAs here on SG seem very random, cant say the same for Discord GAs. I feel the popular bots have sort of a bias.

Yes and no.
So basically. If you join 2 giveaways. For this example let's say giveaway A and giveaway B.
10 people join giveaway A, while only 2 people join giveaway B (including you). Therefore you have a 50/50 chance of winning giveaway B and a 1 in 10 chance of winning giveaway A.
So if you only join giveaway A, you have a smaller chance to win than joining only B. But joining both means that you have a about 55% chance to win at least one of them.

I have been in this site for more than 10 years. I know a lot of Math (sorry, that sounded really presumptuous... but, well, for such purposes, I do). I have seen absolutely no evidence whatsoever that the GA's picks aren't uniformly random as advertised.

If I had to nitpick one side effect of joining 2 GAs ending at the exact same time -- if you enter for the same game, and you win 1 or both of them.... well, I have no idea how the site treats this... Possibilities:

1. The site actually picks one winner at a time; if you win 1 of them, the site removes your entry for the second one...
   • ...and refunds your points accordingly?
   • ...and you lose your points spent on the 2nd one?
2. The site picks all winners from those GAs, and then later filters out and eliminates double winners...
   • ...and you lose your points spend on the filtered GA?

I would be curious to find out which one it is!

Cheers!

I guess, from your point of view, there is always a chance I could be lying. Or, well, I could be wrong.... nah, impossible, I am never wrong. ;D

Every giveaway draw is a statistically independent event:

https://en.wikipedia.org/wiki/Independence_(probability_theory)

Two events are independent if the occurrence of one does not affect the probability of occurrence of the other or, equivalently, does not affect the odds

(barring the fact that you can't win the same game multiple times, so once you win a game, you are automatically withdrawn from all other GAs of the same game)