With the recent controversy over the sale of adsb Exchange I am not initially thinking of ceasing feeding but I have looked at two other, apparently not for profit sites.
Opensky-network seemed interesting but @abcd567 commented the forum very quiet so may be dying out, it does still share data though so worth a look…
adsbhub.org is interesting, the aim appears to be sharing data, there is no forum I am aware of so not sure how enthusiastically it is supported. Once you feed them they activate a return feed which is global that can be fed into VRS or similar.
ADSB.fl has sprung up in the last week or so. Reportedly some of the devs from adsbexchange are behind it. I started feeding it in addition to adsbexchange, but I’m reserving judgment on adsbexchange until we see what the new owners will do.
Yes, heard talk of them, shrouded in a bit of mystery at the moment. Understand there is some discussion on discourse about it but I havent an account so not familiar with what is occurring.
I too shall continue with adsbX unless I see a major change.