How is this possible?

[Rizla]

No.
This happens when same server teams do up selling. They are at one level above the others and sell the player to a team one level above it. Then this team sells him to another team one level above it. This process continues till the player reaches the main target team which is at highest level. So this way his greys remain 1%.

300% whites are due to earlier friendlies trick. Now it costs a lot of greens to get to 300%. But if the great exploiters have found a new method; then I know nothing about it.

This is not exactly true.You definetly need a high number of greens but not as much many people think so.
Αs the new training system teach us the quality no longer plays a role in how quickly a player develops,
but it depends on how high the set of attributes is on a specific drill.
So if you are upselling a player and train only white skills to lets say 100% then in your final team
you will train him with mix drill that trains white and grey skill which will save you a TONE of green packs.
The flaw to this procidure is the time you need to do it.
Thats why Nordeus have to stop the upselling or reduce the attribute cup from 340 to 180%

[Hunter]

This is not exactly true.You definetly need a high number of greens but not as much many people think so.
Αs the new training system teach us the quality no longer plays a role in how quickly a player develops,
but it depends on how high the set of attributes is on a specific drill.
So if you are upselling a player and train only white skills to lets say 100% then in your final team
you will train him with mix drill that trains white and grey skill which will save you a TONE of green packs.
The flaw to this procidure is the time you need to do it.
Thats why Nordeus have to stop the upselling or reduce the attribute cup from 340 to 180%

Under the new system, how many greens do you use to get a player(80%-90%) to 300% if we choose the right combination of white+grey? If its more than 100 then its too much for one player (for me).