Credit to OP at MyDealz
for the heads up.
Currently there is a trick to claim any of the PS Plus Collection games that are offering a free demo on PS Store free of charge on a PS4, if you are a PS Plus subscriber. Depending on the region of the PSN store you use, there are different demos being offered. I am using Resident Evil as an example here.
For that, all you need to do is to download the demo version on your console and choose the purchase option from the demo. If you are subscribed to PS Plus, it would show the game as free and you can claim it on your PS4. It is handy if you don't own a PS5, of course.General Instructions:
1) Download the Resident Evil 7 Teaser Demo: Beginning Hour file on PS Store.
2) Open the demo and from the main menu choose "Buy Resident Evil 7: Biohazard"
3) When the PS Store opens up, choose the third image, on the right, "Game Page"
4) Press on the "Choose Version" button
5) Choose the second version and press "Buy"Video instruction:Proof:
I just created a dummy PSN account and signed up to 1 month PS Plus on my PS4. Please note once you choose the version it will still show the game at full price but once you proceed to checkout, it will show as free if you are PS Plus subscriber.