|User since||July 19, 2019|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
Rated 5 out of 5 stars
It works fine.
I started using it when it was free (and unmantained), and I intend to continue using it after Thunderbird 68 is released, so I just paid for the license.
I don't see why the new author shouldn't get a small reward for his work, since he has actually added value to the project, by adding support to TB 68 (and fixing some other small bugs).
The price is fair.