So just to clarify one more time... I would like to add this happened not when they introduced refunds... but when Steam Summer Sale started.

引用自 Sepioth：

drops everything fine for me... the lack of drops from one game to another you are seeing is probably the new 2 hour wait on card drops Valve implemented recently.

Cards will not drop for the first 2 hours of playtime/ idle time. this is because of hte new refund policy.

as far as running two games at same time. it was never recommened to do that as it kills drop rates makng cards drop much slower than running one game at a time.

no. i idle all night (that means 8 hours in game with no drops).... only the first game gives drops.
then close idlemaster and run it again and it starts dropping at normal rate (15 mins each)

I tested this for about a week before I posted this.
The change happened after Steam Summer Sale started.

Every 15 minutes should give you a drop. There is no 2 hours playtime limit.

There has been some changes since last week:

- Running 2 games at the same time will NO LONGER give you any drops.
- Using IDLEmaster it will only give drops for 1 game. After that no more drops. If you restart IDLEmaster the same will happen. Only drops for the first game you IDLE.

So you need to make it so that the Idlemaster CLOSES the game and waits for about 2 minutes until it OPENS the next game.