The OJAK provided selection rates, but hasn't been updated since 2016 (posted below). I'm interested as well, this is likely the first board where multiple applicants have developed a package after their airline dreams went on furlough. USMC Helo Drivers Aviation Bonus (AvB) just dropped $50,000 from last year to this year. I'm sure as manpower shortages stabilized the demand signal plummeted. Interestingly, there is still a restriction on Marine pilots (O-3 & Below) blocking inter-service transfers.
I saw the recent article lengthening Army service obligations from six years to ten. I'm not sure the Army is going to get the mileage they expect from that (IMO).