There is only one site I bet and it's dota2lounge (www.dota2lounge.com)
Here's a video on how to bet in dota2lounge
it's easy as a point-blank arrow
afaik, you can only bet commons, uncommons, rares and keys.
auspicious-tagged items can't be placed and you can only bet 4 items at a given time.
IN CASE YOU GET MAD BECAUSE YOU LOST YOUR ITEMS, PLEASE DIRECT IT TO THE QQ THREAD
Let's use this thread to discuss bets related topics. If you have more betting (items-only) sites then feel free to share.
Tip:
-When you win, you don't have to retrieve your winnings right away. You can bet them again in other matches without the hassle of trading with bots. There is a limit on how many items dota2lounge can keep for you though.
-Taking Length of series into account:
On September 08 2014 09:41 motbob wrote:
If you bet regularly on Dota2lounge, you are probably familiar with the fact that you need to take the length of a series into account. As the series gets longer, you should be willing to take odds that are more skewed towards the favorite. An example: today there was a match between Empire and Alliance. Empire has looked significantly better than Alliance recently, so the 60/40 odds look off at first glance... until you realize the match is a Bo1. OK, that's fine, Bo1 games are pretty high variance. The odds would probably be something like 65/35 if it were a Bo3.
But I worked out something interesting regarding the so-called "best of two" format where teams teams play two games (with the potential of a 1-1 tie). It turns out that, on Dota2lounge, you should treat Bo2 matches the same as a Bo5 for betting purposes. The favored team is about as likely to win you rares in a Bo2 as it would be to win a Bo5. Here's the math comparing a Bo3 and a Bo2:
Let's say Team A has a 60% chance of beating Team B in a given game.
In a Bo2, Team A has a .6*.6=.36 chance of going 2-0, while Team B has a .4*.4=.16 chance. The chance of a 1-1 is 0.6*0.4*2=0.48, but Dota2lounge returns your items in the case of a tie, so we need to focus only on the two cases where a team goes 2-0. Items are won/lost 52% of the time (.36+.16), and Team A goes 2-0 36% of the time, so we just take 36%/52%=0.69 to find out the proper odds for betting on Team A (69/31).
In a Bo3, Team A has a .36 chance of going 2-0. As mentioned above, the chance of a 1-1 is 0.48, and Team A has a 60% chance of winning the third game, so the chance of Team A winning in three games is .48*.6=0.288. Since either going 2-0 or winning the third game are the only two ways Team A can win the series, we add .36 and .288 to get the chance of Team A winning the series (0.65, so the proper odds for a Bo3 are 65/35).
69% for a Bo2 vs 65% for a Bo3. I won't do the math here, but the chance of Team A winning a Bo5 against Team B is also about 69%.
If you take issue with my math, I will be happy to defend it to the death in the thread below.
If you bet regularly on Dota2lounge, you are probably familiar with the fact that you need to take the length of a series into account. As the series gets longer, you should be willing to take odds that are more skewed towards the favorite. An example: today there was a match between Empire and Alliance. Empire has looked significantly better than Alliance recently, so the 60/40 odds look off at first glance... until you realize the match is a Bo1. OK, that's fine, Bo1 games are pretty high variance. The odds would probably be something like 65/35 if it were a Bo3.
But I worked out something interesting regarding the so-called "best of two" format where teams teams play two games (with the potential of a 1-1 tie). It turns out that, on Dota2lounge, you should treat Bo2 matches the same as a Bo5 for betting purposes. The favored team is about as likely to win you rares in a Bo2 as it would be to win a Bo5. Here's the math comparing a Bo3 and a Bo2:
Let's say Team A has a 60% chance of beating Team B in a given game.
In a Bo2, Team A has a .6*.6=.36 chance of going 2-0, while Team B has a .4*.4=.16 chance. The chance of a 1-1 is 0.6*0.4*2=0.48, but Dota2lounge returns your items in the case of a tie, so we need to focus only on the two cases where a team goes 2-0. Items are won/lost 52% of the time (.36+.16), and Team A goes 2-0 36% of the time, so we just take 36%/52%=0.69 to find out the proper odds for betting on Team A (69/31).
In a Bo3, Team A has a .36 chance of going 2-0. As mentioned above, the chance of a 1-1 is 0.48, and Team A has a 60% chance of winning the third game, so the chance of Team A winning in three games is .48*.6=0.288. Since either going 2-0 or winning the third game are the only two ways Team A can win the series, we add .36 and .288 to get the chance of Team A winning the series (0.65, so the proper odds for a Bo3 are 65/35).
69% for a Bo2 vs 65% for a Bo3. I won't do the math here, but the chance of Team A winning a Bo5 against Team B is also about 69%.
If you take issue with my math, I will be happy to defend it to the death in the thread below.
I'll update this thread in the future with more info.
6/3/2014 edit: You can now bet mythicals, legendaries and immortals
9/8/2014 edit: Added a bit of motbob's tips in betting regarding length of the series