fwiw, Stellar integrates directly with Keybase.¹ I remember they did an airdrop when they launched and deposited ~100$ worth of XLM into every Keybase users' wallet.

Not sure how interesting Keybase is now, but it does allow sending money to other Keybase users directly through chat.²

[1] https://keybase.io/blog/keybase-stellar-launch

[2] https://book.keybase.io/wallet#chat