"GNU Parallel is indirectly funded through citations. It is therefore important for the long term survival of GNU Parallel that it is cited. The citation notice makes users aware of this."
It's a bit like saying:
"Webkit is indirectly funded by iPhones. It is therefore important for the long term survival of Webkit that people purchase iPhones. The iPhone notice make users aware of this."
We probably have to agree to disagree on that one:
I see loads of commercials for buying iPhones. I do not see a lot of commercials for citing GNU Parallel.
If I have to make a citation, it will cost me no money, but one line of text if I write an article. If I have to buy an iPhone, it will cost me many hours of work.
To me the two things are not even close to be similar.
But I can find one similar aspect: No one forces you to use an iPhone.
"GNU Parallel is indirectly funded through citations. It is therefore important for the long term survival of GNU Parallel that it is cited. The citation notice makes users aware of this."
It's a bit like saying:
"Webkit is indirectly funded by iPhones. It is therefore important for the long term survival of Webkit that people purchase iPhones. The iPhone notice make users aware of this."