No different at the moment than someone adding a no value note in Damus or Amethyst. If people don't like it it doesn't get zapped. Simples. Although there is another feature I'm looking into which will run into that problem. Check out mapstr.xyz which is based on open source version but has a few more goodies. On right menu find the Supercell icon and you'll see a zap split idea. 

 Are there any pins to look at on demo map? I couldn’t find any 

 It's pulling btc locations within 104km so you may be unlucky. I can add more data if that helps. Like cafes or something so it's more likely to get a hit. 

 I'll tell you when it's up