Complex sentence: Since then, most postal services have issued a steady stream of stationery alongside stamps; often the design of the stationery mimics the contemporaneous stamps, though with less variety and lower printing quality, due to the limitations of printing directly onto the envelope.
Split into simpler sentences: Since then, most postal services have issued a steady stream of stationery alongside stamps. Often the design of the stationery mimics the contemporaneous stamps, though with less variety and lower printing quality, due to the limitations of printing directly onto the envelope.