The hourly cloud backup promoters are not happy with you. You will be visited by these experts, who will explain why all the data in a household should be backed up hourly
That includes all legally downloaded video content and all those home videos people make in their lives.
This issue is similar to the "sufficient power" statements by Rolls-Royce about the engines they used. Does that "sufficient power" take into reasonable account all the reasonably predictable real world situations the operator may encounter?
A 100Mbps connection can theoretically download about 33TB of information per month, if it runs continuously. Offering about 10% of that, or 3TB, per month would seem more in line with the short to medium term projections of how the internet might be used by a family of always connected cloud people. Similar allocations could be made for other speed tiers. The 250GB cap was established when much video access via the internet was for 4:3 SD resolution content. The increase to a 300GB cap does little to address the increasing use of 720p and 1080p for legal video content. The increasing use of Netflix and Hulu type services for streaming HD content to HDTVs means the relatively low caps are only going to frustrate subscribers. Ideally, like in a Google Fiber Gigabit service area, the monthly cap would be whatever the connection is capable of. But we live in a world of services based on the oversold model, and have for decades. Airline seats, cellular mobile device services, internet access, POTS, restaurant reservations, hotel reservations, and other services are all based on an oversubscribing business model to some extent. The question is how much oversubscribing is too much oversubscribing. 300GB on a 100Mbps connection is probably indicative of 10x too much oversubscribing.