No, I wouldn't. Not because I don't want to, but because having to refresh it every 15 days kinda beats the point in paying for the account. If I pay I don't want to be bothered, even if i feel like to take a 2 months break. If I pay I want to be able to play as much as I want on my primary shard, and go to the secondary (which would be siege) whenever I feel like it, not being forced to remember every 15 days to refresh it.
I don't know for how many people that goes, but the fact that I can't have even a 7x7 house on siege while keeping at least a small house on my home shard (or vice versa, I suppose I might declare siege my primary shard and my home shard a secondary) is the reason I have closed my account (otherwise, instead of not playing anymore I would be playing almost exclusively on siege, at the moment). Of course I realize that if everybody in the game were allowed this there probably would be much overcrowding. So... it's a problem, isn't it?
Edit: since I would like a second house, but without decay, I didn't vote in the poll.