@Helen3 Perhaps because they are trying to promote LTRs now. I'm sure they want hosts to sign up for those, so it ends up looking like a successful initiative. But in order to take LTRs, hosts would have to clear their calendars of any bookings they currently have. Hosts can cancel any future reservations for the rest of the year, but cancelling them is only possible without host penalties until May 15. So they are kind of prodding hosts to cancel, but only giving them a short period of time to make that decision, or there won't be enough hosts to fill up their proposed new LTR category, is what it seems like to me.
Or I could take off my suspicious, ulterior motives hat and think they are doing this out of concern for the safety of hosts and guests during the pandemic. But in that case, they'd let hosts cancel without penalties until the pandemic was no longer a big threat, wouldn't they? Why only until May15?