What features does SPT have? Does it have x (e.g. airdrops/insurance)?

SPT has:

• Airdrops
• Functional insurance returns
  • Not 100% guaranteed return
  • Different return chance per trader
  • Chance some insured items are removed before return (e.g. scopes/silencers)
• Fake players/PMCs (repurposed AI)
  • Have player-like gear
  • Have weapons with randomised attachments
  • PMCs between levels 1-15 have reduced gear to simulate no access to flea market
  • They don't extract
  • They don't loot
• Flea market
  • Items listed by fake PMCs
  • Items can be listed and purchased by fake PMCs

A full list of SPT functionality can be found here