Their terms and services forbid third party clients for security reasons, and they have enforced it before. They have a bit of a point in that they can't ensure that 3rd party applications aren't spying on you, or more importantly other users you chat with, but that point is mooted when they refuse to document the risk of other apps, like your phone keyboard or "AI" assistant doing the same (which is already happening in some countries).
How long till they cut off access?
You will likely need to update every two weeks or it will stop working
Why would they do that?
Their terms and services forbid third party clients for security reasons, and they have enforced it before. They have a bit of a point in that they can't ensure that 3rd party applications aren't spying on you, or more importantly other users you chat with, but that point is mooted when they refuse to document the risk of other apps, like your phone keyboard or "AI" assistant doing the same (which is already happening in some countries).
The second Signal works out that this exists.