There are no ads because ads often make the site load slower, don't match the clean layout of pages, or can be malicious in nature.
We'll run as long as we see fit without ads, but this doesn't mean we'll never have any. We may consider simple, clean ads from hosting providers or similar that may be suitable for our userbase (mostly programmers, sysadmins, game developers, etc)
I work on this site in my free time, and anything you wish to contribute towards hosting costs is appreciated. It does take time to filter through reports and removal requests, along with AUP violators, and it's quite often a thankless job.
If you wish to buy me an energy drink, pop, or a candy bar, feel free to use the information below.
Bitcoin Address: 1Mivk3Vx4foRSTf4aLrfBxCeobvpbxCuxg (click to copy)
The only reason we'll look at pastes is if they are reported for violating our AUP, or if we get a DMCA complaint about them. We never snoop around what users paste, and it's none of our business.