Check out the estimated APY based on the maximum BNT Liquidity Mining rewards distributed per week:

https://twitter.com/Bancor/status/1338441571499438082?s=20

Rewards will appear retroactively in http://bancor.network upon activation this month.

For more details on BNT LM rewards, see the Bancor FAQs: https://docs.bancor.network/faqs#3-bnt-liquidity-mining