Basically, your asking what would someone do with about $800 to make Steemit a better place...
Well, right now it seems the Steemit 2019 silver rounds are struggling to get pre-orders done... Which are some of the coolest silver coins to collect.

• I'd simply buy $800 of pre-orders which is about 33 coins.
• And then host contests on various social platforms to give them out for free.
  -Obviously keeping 1 or 2 to myself.

That would be my project - and probably one of the best ways to use $800 to attract new users and market steemit.