I was also confused when I noticed 1500 BOBx tokens on my address. In addition to these 1500 tokens, I also got some TRX tokens.
The interesting part is that I never use this address for Airdrops, or similar. It's my HOLDER address that I use with Ledger wallet.
There was a TRX airdrop for people holding over 1 ETH.
Oh, now it is clear. Thanks for mentioning that out