Those cooldown/pending periods still apply even if you use 3rd party sites. You just have at risk of getting scammed or account hijacked by using 3rd party sites.

引用自 miamew3：

Those cooldown/pending periods still apply even if you use 3rd party sites.

For CS2 items? Maybe. For TF2 items never.

No steam doesn't.. if the "MP Users" would stop using the scam non steam skin / item trade sites, and getting there steam accounts hijacked, due to giving there log in info away, steam would not have to have such protections in place. So blame the users going off site for what your complaining about.

引用自 Kyouma：

引用自 miamew3：

Those cooldown/pending periods still apply even if you use 3rd party sites.

For CS2 items? Maybe. For TF2 items never.

What makes you think that when they are done testing & tweaking the 7 day trade ban & item protection feature via cs2 that they wont apply it site wide?

引用自 pckirk：

No steam doesn't.. if the "MP Users" would stop using the scam non steam skin / item trade sites, and getting there steam accounts hijacked, due to giving there log in info away, steam would not have to have such protections in place. So blame the users going off site for what your complaining about.

There are some trading sites with a decade reputation, so I can trust them. Also site can't steal your steam session if it's using official Steam API auth (Any site that asks you to auth with your steam credential "in-place" is a phishing)
And even if something is trying to steal your items, you still can stop this when see trade confirmation in mobile app.
In my experience, the only issue with this sites is 1-3 hours, rarely 24 hours wait time untill I receive trade with stuff I buy which is still acceptable cuz i immediately receive instantly tradable item

引用自 Kyouma：

Steam really wants me to use 3rd party item sites

Buyer gets 7 days trade ban for bought item, seller gets his funds pending for no reason
This is so f'd up, especially pending funds, I hate this so much

I remember Gabe's quote about piracy "It's a bad service issue. If we provide better service, there's no need for piracy"
Same could be applied here: "If steam marketplace provides worst service, there's no need to use it"

Actually read GabeN's entire quote.

“We think there is a fundamental misconception about piracy. Piracy is almost always a service problem and not a pricing problem,” he said. “If a pirate offers a product anywhere in the world, 24 x 7, purchasable from the convenience of your personal computer, and the legal provider says the product is region-locked, will come to your country 3 months after the US release, and can only be purchased at a brick and mortar store, then the pirate’s service is more valuable.”

https://www.escapistmagazine.com/Valves-Gabe-Newell-Says-Piracy-Is-a-Service-Problem/

The sentiment regarding that quote still stands.
The service Steam provides is nice on paper but if everything barely works and features just become more and more restrictive as time goes on, there is no reason to continue using Steam or spending money on it.

Especially with all the region locking, age confirmation and censorship stuff thats been happening over the last few years.

Use of third party sites is a violation of Steam's ToS, so no they are not trying to get you to use third party sites.

Make everything bind-on-pickup and get rid of trading and the marketplace entirely. It just causes problems.

引用自 wesnef：

Make everything bind-on-pickup and get rid of trading and the marketplace entirely. It just causes problems.

This^^^^
If the ability to trade/buy/sell items was removed, it would cause all the issues of people getting their accounts highjacked would lessen a great deal.