[2022] Wait... what... really?

No, no one is getting banned as a result of this system alone. It is an anti-fraud system, so if you are committing fraud, you will be banned, sure. But that is not going to be an issue for legitimate players.

Please refer to the patch notes: March 24 Weekly Update - News | Lost Ark - Free to Play MMO Action RPG

Players who have a Steam account in good standing and have met the small purchase requirement needed to use Steam’s social systems shouldn’t be impacted. Players who have not met this ‘Trusted’ status through Steam or Lost Ark will have reduced access to a small number of social and economic systems. Specifically, these accounts will have smaller daily Steam purchase limits than ‘Trusted’ players and be prevented from:
-Initiating player-to-player trades (requests can still be received)
-Sending in-game gifts
-Exchanging Royal Crystals for Gold
-Sending in-game mail with attachments

To have the ‘trusted’ status for Lost Ark, you need to have either made the purchase required by Valve to access Steam’s social systems OR made a purchase in Lost Ark. If you have not done either of these things, you will not be banned, just restricted from the above (and sending shop gifts or exchanging Royal Crystals requires a purchase anyway)

No, if you made a purchase you will be fine