Apple is losing one lawsuit after another, courts see so many litigation filed by Apple it is getting harder to take them seriously. HTC is a small fish but they also do hold quite a bit of patents that Apple need, and HTC needs some of Apple's patents. This is a trade that is beneficial to both companies. Plus HTC would be able to take some of Samsung business because they are both Android machines, the enemy of my enemy is my friend applies I guess. Apple can now concentrate on the big fish, Samsung, as a double whammy.