A number also made headlines for the not so voluntary nature of their voluntary donation schemes. (schoolsweek.co.uk)
For example miners receiving block rewards won't be taxed since their services are deemed to be of voluntary nature according to the document. (kryptomoney.com)
However, the purely voluntary nature of these initiatives so far (except in Quebec) makes it doubtful many employers will even offer them. (canadianbusiness.com)