Quote from the link provided :
An alert and active checking on cash transactions amounting to ten thousand euros has been implemented. This limit has been brought down from fifteen thousand euros. Any transactions exceeding the aforementioned threshold will be considered as obliged entities. This comes under the extended AML regulations that now place wider range of restrictions on monetary exchanges that are over a particular amount
The 10,000 is still a big amount and people could still fly under the radar with their cash transactions if they did small tranches of their real transaction multiple times below 10,000. What they will mostly do is instead of making a whole transaction worth 10,000 they will just do two 5,000 transactions in order to remain undetected. What if they just monitor or provide a cap on how many transactions you can do everyday it will be more effective compared to only doing the procedure on transactions above 10k.