An official message from the developer mentions a donation of 0.01 Euros and general lack of appreciation.

GuruWare decided to stop supporting a 3ds Max plugin called Ivy Generator. Why did this happen? An official message from the developer mentions a donation of 0.01 Euros and general lack of appreciation. The author wasn’t happy with the way community treated his project, so he stopped the development and removed existing builds of the tool. 

Art by LemonadeCG

Here is the message from the developer:

you can share the zip-file on any site or torrents or whatever, you can also delete it
there are lots of tutorials on the web, somewhere it was rated as one of the 10 “must-have”-plugins,
google for “guruware ivy” – after 10 pages i stopped clicking “next”
must be useless then

downloaded more than 35.000 times, 17.000 connections per month
the sum of donations in 8 years didnt even cover the domain-cost, which i only have for… you?

and please dont start donating now out of pity, dont need that either
also dont need a beer, i’m not drinking alcohol

remember: this is not a rant, maybe it sounds like, but i can assure you
actuially having fun writing this

now i have more time to do stuff i like,
“keeping up the good work”, and play with toys i don’t share anymore, at least not for free

GuruWare 

You can get more details on the situation on the GuruWare website.