Richard Haldenby says his average monthly bill for Harvest had risen from $130 (£95.50) to $2,110.
According to a Freedom of Information (FOI) request the number of letters sent has almost tripled since 2024.
The digital bank said all of its services were now "back up and running"
The ChatGPT-maker said training will be slowed for two weeks while it puts the upgrades in place.
The war in Ukraine has spurred people to consider putting vital infrastructure underground.
Meta argued social media addiction does not exist, as a trial stemming from a major lawsuit brought by US states started.
OpenAI insisted this was not in response to a particular issue with children believing ChatGPT to be alive.
A new UK trial hopes to reduce the condensation trails from planes, which can trap heat in the Earth's atmosphere.
US states are suing the social media giant to force an overhaul of its platforms for young users.
Mobile game No 10: Full Confidence recently ranked above Minecraft on the UK App Store paid games chart
Booksellers are reporting mysterious bulk orders. It's thought the books are being used to train AI - and ending up pulped.
Meta boss Mark Zuckerberg is the latest Big Tech name to pen a letter thousands of words long about AI.
The dating app's boss says the move is in response to a successful trial and a change in what users want.
Vapour trails from aircraft contribute to warming in the atmosphere.
For years, schools have posted photos of their pupils online. But could they be misused?
Electric power is one of several cleaner alternatives to traditional aviation fuel.
What do we need to know about agentic AI?
New technologies measuring forests and exclusive access to a hacker rehab programme.
Highlights from the Esports World Cup in Paris and how to build a gaming PC.
Ammie Sekhon goes behind the scenes of WWE to see the tech that supports the show.
Adrienne Murray has rare access to Microsoft's Quantum Lab in Denmark.