Not necessarily, it all depends on the software license, people don't usually care about who funds their software, ( even if they're funding it themselves with their data ), plus If we're talking about selling points, saying that you can control your online presence is a much successful sell than saying it's not VC funded, like I never used that argument when I try to convince my friends to hop on Mastodon

Edit: but I'm not saying it's not a valid argument, it's very valid