You talk about corporate sponsorship like that's trivial to find. Trust me when I say we spent over half a year chasing down grants/sponsorships only to be met with closed doors, extremely long wait times for pennies. We'd also be required to keep our day jobs—which means less focus on Tangled dev, and ultimately very slow progress overall.
We debated VC heavily (we're both idealists after all), but figured we can make it work—it's ultimately the founders that make bad calls leading to enshittification. There's plenty of examples of VC-backed companies that haven't enshittified. Tailscale is an excellent one, and hence we brought on Avery as an angel in our round.