Options for Fransat on 5W with Freesat

I have a Freesat V7 and attempted to get Fransat on 5W. Most channels are, of course, encrypted.

I can't easily or cheaply buy the card, so I am wondering whether the Viaccess softcam decoder will work with some keys directly, as the cards seem valid forever.

Or is it more complicated than this? I'm totally new to all of this, so any help (public or PM) is appreciated.

Is this still the case for lifetime access cards for 5W Freesat? (Which is different access from the 18.2 Freesat)

I've seen another V7 user post pictures of their 5W access, so I know it's possible somehow...