Like I've mentioned already in this thread; we are in 2018. We backup everything, we put everything on the cloud, etc. Forcing to remove PM's which may have a use in future (they do) or if something happened with a specific member is not something I want to do.
Having to spend my time after being gold for 2 years deleting PM's (again, we are talking about 300+ here just to get PMing working again, probably additional 20 or so to have some 'proper space') is ridiculous and is just something that makes the PM space increase a 'you better be permanent gold or else you'll have a bad time', which is basically now because I can't send or receive PM's anymore until I 'clear' this space, which I am not going to do.
If however the feedback is not happening, I guess I will just stay PM-less until we move to Xenforo, which will without doubt remove this feature. I better not jinx it now
As for subscribing; if there was things that were attracting besides the PM limit LOL, I gladly would.