Double check your Badges page to make sure you have drops remaining. If you're not sure where to look, the yellow boxes in this image show the correct location.
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=503188239

Free-2-Play games do not give any cards just for adding them to your library, you must spend 9$US through their store for each card. Non-F2P games give half (rounded up) the total number of cards in the set. Duplicates will count against your allotment of free cards. Trading/Selling/Using your cards will not grant you additional/replacement cards.

At a glance, all your non-F2P games have more than enough time to have provided all their free cards.

Valve has never clarified, but cards can be considered part of the Steam Subscription Marketplace.

http://psteamproxy.yuanyoumao.com/subscriber_agreement/

You may not use Cheats, automation software (bots), mods, hacks, or any other unauthorized third-party software, to modify or automate any Subscription Marketplace process.

As you point out, it doesn't hurt Valve to let you use IM and it saves them bandwidth so it's highly unlikely you'll get in trouble.

Yes.

From the FAQ

Can Idle Master be used to pad my playtime of a particular game?

The steam-idle.exe application that's included with Idle Master can be given a command line argument of the appid of the game you'd like to idle. For example, if you'd like to idle Team Fortress 2 for playtime, you can simply run "steam-idle.exe 440" from a command prompt. There is no user interface for this, it must be done through the command line.

引用自 Foxhack：

... Could someone please test the Python version of Idle Master on Windows or Linux?

Works on Linux. Woodle Tree Adventures gave its cards at .2 .3 and .5

As long as you have remaining drops for a game, Idle Master will eventually get around to idling it. If you have received your allotment of free cards, Idle Master will not automatically run the game.

If you have no drops remaining but want to pad your playtime for whatever personal reason, IM is capable of doing that when started through the command prompt.

What version of Idle Master are you using?

引用自 Cowsep：

If this is true, please publish a update with 2 options. "2 hours mode" and "non 2 hours mode". 2 hours mode is same. none 2 hours mode will make it play only one game at a time like old times.

It already does, JShackles even mentioned it in the starting post.

There has been no indication that JShackles is stealing our accounts, either from reports of people who lost accounts nor from people who have looked at the source code.

Double check your Badges page to make sure you have drops remaining. Free-2-Play games do not provide drops just for adding them to your Library, you must spend 9$US for each drop. Non-F2P games add half (rounded up) the number of cards in the game's set. Duplicates will count against that number. Trading/Selling/Using those cards will not give you additional/replacement cards.

You appear to only have 1 non-F2P game (CS:GO) and you have more than enough playtime to have received your all of your free cards.

I've never seen a claim of someone's account getting a ToS ban over Idle Master.