It's a little early to say. The terminology is still being worked out, and we'll have to see how the term 'WLS' is used in actual commerce. 'Subscribe WLS' doesn't sound right to me.
What are people going to say if WLS is implemented?
"I have the WLS on that name."
"I have the WLS subscription on that name."
"I need to subscribe WLS on that name." ?
"Where can I find the cheapest WLS?"
I don't know.. ideas?