It shouldn't be in users contributions , it's not free.
It's not a contribution, you don't really "contribute" to 3DGS community,
but in Showcase 1.

And things like that should be done by conitec and included in the SDK
to have a really sdk helping artists a lot more.

A fantastic tool like Particle Editor is a lot more work than this little thing and it's free

I'm like other people we will never pay for stupid little things that we can have the code easily
If it was big big tool like a very complete terrain editor in real time,
( what you see is what you get ) with editing of heigtmaps,
and terrain with brushes, vegetation/rocks placing like Far Cry editor
perhaps i would see if i'll pay (Torque has this for free).

Perhaps very newbbies will pay.