Idle master reads your badge page, linked here, it looks for 'card drops remaining'
http://psteamcommunity.yuanyoumao.com/my/badges

Steam gives the cards(not idle master), it only ever gives half set number of cards.
http://psteamcommunity.yuanyoumao.com/tradingcards/faq

You need to buy the rest or trade for them:
http://psteamcommunity.yuanyoumao.com/market/

See pinned discussions.

4.62 or better

Check MS .net framework version and repair it here:
Control Panel\All Control Panel Items\Programs and Features.

Or delete the appdata for idle-master, see pinned discussions.

Yes, buy them or trade for them like everyone else.

Idle master just tells steam you are playing a game, you've already played CSGO for hundreds of hours, playing it for more hours is not going to magically drop more cards.

Doesn't work that way. Steam only drops half the badge set for paid for games, steam doesn't drop cards for free-to-play games except if you buy dlcs or in-game purchases.

See you badge page 'X card drops remaining' on every game with cards that you have.

http://psteamcommunity.yuanyoumao.com/my/badges

http://psteamcommunity.yuanyoumao.com/tradingcards/faq

How To Fix Most Idle Master + Steam problems

See pinned discussions

Yeah, but oops, 200 sec = 900mb, not 45sec, math fail.