I figure the only way this is economic is because they have a technical customer base who phone support maybe twice a decade.
Years back I had a conversation with someone who had done a couple of ISP mergers, and his opinion was that techie-focused ISPs look fantastic on paper because their support costs are really low. Then someone buys them, tries to expand their userbase to "regular" people, and their support costs fall in line with the rest of the industry (eg Demon -> Thus -> Vodafone).
So far, A&A have avoided that fate.
Isn't a stable connection more important?
Oh, and on the subject of stability, they send me an SMS every time my line goes up/down. Even if it happens at 4AM. They don't have to, other ISPs hope you won't notice, it's just a nice feature.
Support is for the times where the connection isn't stable, and it appears AAISP handles these situations better.
Support is not important, until you need it.
There are alt-net providers out there (who shall remain nameless) whose engineers are trained to practically breathe down the necks of their customer just after installation in order to get them to post a 5-star review on Trustpilot. However the reality is when the customer has an issue down the line, they discover to their horror that the post-sales support is shit.