The war in Ukraine has spurred people to consider putting vital infrastructure underground.
The ChatGPT-maker said training will be slowed for two weeks while it puts the upgrades in place.
According to a Freedom of Information (FOI) request the number of letters sent has almost tripled since 2024.
Richard Haldenby says his average monthly bill for Harvest had risen from $130 (£95.50) to $2,110.
The app lets users create six-second looping videos and hosts more than two million classic videos.
The deal stems from a 2024 lawsuit alleging TikTok and its parent company ByteDance collected “vast amounts of data” on millions of users under the age of 13.
More than 300 companies are showcasing the latest advances in robotics at the five-day event in Beijing, China, organisers say.
Roehampton University offers students £2,000 a year to play esports alongside their studies.