Altopia is a Usenet news provider that has been around for a long time and while they offer a good level of service they are not really price competitive for a typical end user. Altopia would be used typically by ISPs looking for a relaible USENET newsfeed. So we are recommending you check out our list of best Usenet providers
They are more for an ISP looking to outsource their NNTP feed. You can check out the retention graph on their homepage but as of Sept 2010, they offer 10 days of binary retention.