[axod]

I just mean that they could both decide to cancel the contracts when not beneficial for them to do so any more.

Say buzz takes off (don't laugh).

I'd just rather have millions of paying customers (advertising) than 2 customers.

[davidedicillo]

Yes, and Twitter could start hosting images. Nothing is safe and eternal.

[axod]

Most people don't use Twitter.com they use 3rd party clients, so twitters control is limited.