Your understanding of SAF and commercial advertising seems
remote.
For security in SAF camps, all photographs or visual must be
'security cleared' before releasing to the public. This is to avoid
sensitive materials or visuals from landing into the wrong
hands.
So, on normal days, it is easier to impose a 'no camera' rule than
to clear the pictures one-by-one before someone walks out of the
camp. Worse, pictures can be MMS or emailed out, so 'no camera'
rule is imposed.
For Keppel to sponsor / advertise a drama serial, they got to pay a
lot of money. Their objective is definitely commercial. It could be
a way to showcase their company, or supporting MediaCorps, but not
without any gains on their part, after putting in loads of
money.
MediaCorps will write a script, and then entice 'script-related'
advertisers, before filming. Otherwise, where does MediaCorps find
the money to produce shows and pay their crew.
Shows and advertisements will have psycho effects, and a guy at 18
years old ought to be able to think properly. If he has mental
problems, SAF will also not accept him.