[jillesvangurp]

Understandable. But you have to consider that the Stellar foundation has been supporting keybase.io financially.

Also, your association of cryptocurrencies with scams is understandable given the sorry state of e.g. the Ethereum and EOS ecosystems which are dominated by get rich quick schemes, pyramid schemes, gambling apps, and other stuff. Not exactly enthusiastic about that myself.

However, among its peers, Stellar is relatively respectable in the sense that it has some serious corporate partners (i.e. normal legal entities in normal jurisdictions) and quite a few stable coins issued by fintech companies for the purpose of supporting international payments. And with support/involvement of regulators in many countries.

Additionally there seem to be some serious use cases emerging. The most significant of those would be IBM building a SEPA competitor on top of stellar with dozens of international banks. But there are other applications as well.

Keybase associating with Stellar is not necessarily a bad deal for them as they get money without giving away shares (presumably). And given the nature of their technology, crypto wallets are a natural use case for them as the whole point of their platform is making key management usable for end users and crypto wallets are literally nothing else than key pairs.