If you're an employee travelling on business, your company might have a per-night budget for hotel accommodation. If your budget is $150, then you can't stay in a $160 hotel. You _can_ probably stay in a $150 hotel which charges $15/night for internet access. You'll expense the hotel (within the budget) and expense the internet access fee (reasonable expense whilst travelling).

The hotel gets an additional customer. The employee gets to stay at a slightly more expensive place than the official budget allows. The employer loses.

I'm ignoring the speed/latency/packet-loss etc., of course.