And what they do about business users.
I can tell you what they'll do on that score now - they will not offer any sort of business service.
Technically its a breach of T&Cs to use a Sky connection for anything other than personal use. The reality is they don't care what you use the connection for, just as long as you accept there is no SLA* and no consequential losses.
Frankly I would advise you not to consider using Sky if its a business run from home. If something does go wrong then its likely that Sky won't report it to Openreach for 72 hours (can take 72 hours+ to escalate within Sky CS) and then you have potentially another 5 working days on top of that for Openreach to attend.
If Sky had wanted business customers then they'd have made the change when UKO was closed down. They didn't.
I advise you to make plans now if you use the connection to run a business.
*Usual Openreach SLA applies, no enhanced SLA possible.