If you know crypto, it had several problems. There are worse coins to airdrop on your users but not many. The user experience resembled that used by scammers on Telegram and the project's overall behaviour looked like a de-anonymization attack (I mean that seems to be Keybase's business model but this looked exactly like one). All of this led to crypto chats on Keybase being targeted by social engineering attacks, and Keybase's famously bad moderation tools made that much harder to deal with than it could have been.
If you don't know crypto it made Keybase look like a crazy crypto project, which isn't an easy sell.
In either case you could be forgiven for wondering when Keybase got their money transmitter license.
So this did get in the way, and the sooner Keybase remove the tab the sooner it will be clear that they are past the denial stage.
This was a bad enough fuck-up that I removed my social proofs and now recommend that people not use Keybase. But if they fixed a few things (remove the Crypto tab, fix moderation, fix name changes) I'd pay them a subscription in a heartbeat.