At the moment I have both my Standard IG accounts and the useless Limited Risk account. I have the demo PRT platform switched on in all of them so I get 75 demo strategies running live on test (still not enough in my mind). I will have to fund the live limited risk account and maybe place the odd bet via the IG platform occasionally otherwise after a while IG shut the account down and I would lose the demo PRT access.
Never close an IG account – they can be useful even when they are useless!