Promising coin indeed! I now using my 2 VPS servers (which also act as nodes for HEAT) to mine, so without any further investments I do get some BIS already.
For the ones not yet aware: One of the community members in HEAT, has created a gateway on the heatwallet as well in order to facilitate trading in BTC/BIS and HEAT/BIS. This can be seen on coinmarketcap as well, with about 5-10% of all BIS volume on the Heat exchange now.
Relevant links to start trading BIS at HEAT AE:
Heatwallet.com > Heat AE site
Heatnodes > Community member (GH2) site
BIS trading at HEAT AE guide
Try it out!