Maybe it's because Skatterman is shit and he ruined 9/10 Strange songs he appeared on?
It's business. Skatterman realizes that, for example, record stores will order a certain number of copies of an album based on how well the previous album sold and that businesses base advertising/promotion dollars for current projects, in part, on the success of past projects. Skatterman can't expect Strange to pump an endless amount of money into project and HOPE that it sells well. If they did that for every release, Strange would go belly up in a matter of months.
Tech, of course, has the privilege of being the first artist on the label. Tech grew his fanbase from the ground up for 5 years bere anything else was released on Strange, so had the opportunity of SOLELY focusing on his own work and setting the base for future releases. The success of Absolute Power (in terms of sales and mindshare, though they lost money) influenced how Everready was marketed, Everready influenced how Killer was marketed and so on. The huge debut of 6's and 7's and strong showing of Strangeland will influence how much the next release is pushed. Etc., etc., til the end of capitalism.