I think what's happened is that Ubisoft has decided to try and push up the standard retail price of a game to match their higher console prices. They've used a clause in their licences (in itself a dodge around consumer law), to close down cheap resellers who were using the internet to sell all over the world. Ubisoft hope to drive every potential customer to their own online service and get everyone to pay full RRP.
What will happen is those people that were happy to shop around and pay less for a game will either stop buying Ubisoft games, or turn to piracy (especially if they've just had a licence cancelled). Instead of getting some money, Ubisoft will get no money from those people.
Ubisoft should have ensured that these licences never got activated in the first instance, not decide after the fact that they were going to take away the games that people have been playing for months. Ubisoft just didn't like not getting all the pie when someone sells out of region, even though they themselves have been using the internet to keep prices high in whatever regions they think will bear it, whilst selling cheaply elsewhere.
Once again, Ubisoft create a toxic relationship with the customer that will actually reduce sales and drive people towards piracy, another product, or away from PC gaming altogether.
