I think Neeva needed user signup growth more than it needed cash. It was reasonably well funded through VC. If it had shown adoption growth they would have received more VC money to continue even if they were losing money on each user.

Kagi appears to be more bootstrapped, so it's very, very important for them to always maintain healthy marginal profits on each user. In this case, your cash is probably very appreciated, and hopefully they're net positive overall so can afford years of potential stagnation after this boom time while still earning a decent living. That allows them to be around to get sudden influxes of new customers whenever various self-inflicted crises damage the incumbents brands. Time in market vs. timing the market.