I think those who have houses and shares on the older JPA version must refund their jpops if you don't have any plan to bring back those "houses and shares". 

Another thing, I must wait till JPA will launch their VIP privileges. Perhaps they have more exciting offer to be a VIP member. I tried playing but I'm still confused and it's a matter of luck. I always got in jail. 

Ahem...

This means that the streets you bought before will be transferred to cards. If you land on an artist in which you owned a street before, you will receive that card for free. If you owned 4 streets from a certain artist for example, you will receive a maximum of 4 free cards for this artist.

Sorry I'm confused. Do you mean those houses before will be automatically transferred to cards? Or we need to play and if we land on that particular street then we'll get it free? Is that what you mean? 

Or we need to play and if we land on that particular street then we'll get it free?

Like you said, you play, land on the artist you owned a house before, and you get the card for free. If you had 5 cards from this artist, you will get up to 5 cards for free. The 6th you have to pay. The game is unrelated to shares and true fans which will be implemented later.

But speaking of shares and houses? what will happen to those if I'm not playing? Well, sorry to ask that again. I'm really can't help to wait for the fully upgraded JPA version.