Secret pocket picks
How do pro players/teams actually get to have secret pocket picks practiced up (e.g. support MF)?
The casters seem to indicate that pro player accounts are all known, so it seems to me if they were practicing them on the regular ranked ladder then people would be able to look them up and see what they're up to, and prepare accordingly.
Additionally if they're using the regular ranked ladder on ultra secret smurf accounts, I feel like most of the time they'd simply be outclassing their opponents, and so something they might dominate diamond/master/challenger players on might actually be trash against worlds tier players.
If they address that by playing other pro teams, wouldn't those pro teams know about their picks in advance?
It seems to me like it'd be really hard to get experience playing at the highest levels on any unconventional champion without it being known, so how is this managed?