Half-Life / Portal Story Loophole? [closed]

While it's true that the Aperture Science Quantum Tunneling Device prototype and its subsequent models are capable of opening a portal from one place to another, the size of objects transported through such portals are severely limited. Furthermore, while it's believed that the "modern" version of the ASHPD (Aperture Science Handheld Portal Device) has a more-or-less infinite range, it's uncertain whether the earlier versions could boast the same. Finally: Aperture portals have to be placed using unimpeded line-of-sight from the portal device on an acceptable surface. As Black Mesa's teleportation technology can handle much larger objects over much longer distances and to destinations that have never before been reached, it's not surprising that the competition for government money was so fierce, despite Aperture's head start.