Project has been around for a while, so it's got some resiliency built in.

Such projects existed for long time, I think Pixel Experience ROM was first.

Or it's an uphill battle (which is still being fought relatively well imho), like with GrapheneOS.

I don't know that they'll care too much - how many people seriously install custom roms on their phone? I'm one of them, and I'm sure there are dozens of us, but probably not enough to make an impact on google's bottom line.

Why would Google be against more people installing their adware?

Only as long as it stays irrelevant. I find it amusing they have a "legal" page.

It sounds like they include all the Google Spyware anyways, so I doubt they have a problem with that...