Do AutoDesk give you a report regarding download count , etc ??
Yes, you'll recieve a mail for each download of your app with the user address, and from Exchange website, you can go to "My uploads" (or "My published apps", I do not remeber) to see the the download count. You can also, by clicking on the count number, download a csv file which contains all the downloaders data.
How about sales? are they good? can you make enough to continue adding more features or to come up with better new apps?
I cant say...
I'm not a good seller at all !
As you can see, the OsnapPalette paied version have been downloaded only 28 times since august 2012 (the date on the picture is the one of last update) while the trial version (with, I admit, a quite gentle 'per session timeout') have been download more than 600 times.
The price issue is also quite difficult: should I have sold more if it was $1.00 ? should I have sold less if it was $10.00 ? Nobody knows...
In fact, I did it more to test the process and to have some advertising.