In the linked article from the blog:
https://gist.github.com/gavinandresen/5044482Therefore, a rational miner should demand at fee of at least $0.0025 per transaction (1 cent / 0.0003 BTC per kilobyte). The current suggested fee-per-kilobyte for the reference implementation is 0.0005 BTC/kb (almost 2 cents).
nastyfans distributions use 0.0005 BTC. The transaction size is 4.5KiB. So we use much less than the Gavin recommendation. nastyfans policy does not discuss tx fees for distributions.
For future distributions I will use the recommendation tx fee from Gavin. For the last distribution this is 0.00219922 BTC instead of 0.0005 BTC.