its anyones guess but M3 has been well enuff supported by Technomate thus far but has been out for a few years now
i got mine pretty much when it was introduced exactly 2 years ago from today
i cant tell you the future but M3 is very much a hobbyist box
and easy to use very much like the M1 And M2 but just much faster all round and specs are much better also .
blind scan and IPTV will always be a feature for the M3
so even if 3rd party addon H/S does go down and it usually will you'll still have plenty of X-Rated videos to watch via IPTV and via other means aswell : ))
good luck : ))