The XL Toolbox add-in is free software, you do not need to pay for it. I
do however appreciate voluntary payments. They enable me to buy
software needed to develop the Toolbox, and they provide some pocket money
as a gratification for investing my time in this project.
This is a companion discussion topic for the original entry at https://www.xltoolbox.net/blog/2015/03/on-payment-options.html