DeletedUser87 these companies do not rely on IP addresses and haven't for years. They can utilize browser fingerprinting and stuff like WebRTC, among many other techniques, to identify you. Having the IPs is just the icing on the cake for them.
Hiding your real IP address is crucial for privacy and anonymity, but it alone is not enough against the larger sites on the internet that have capabilities to fingerprint your browser or app too. For that you need a browser or app with fingerprint resistance too.
But most smaller sites and services on the internet, including all open source ones, only routinely log IP addresses and user agent strings. That is the only logging most server software supports doing out of box. For those, a VPN plus Vanadium (or other reputable open source app) should be way enough to get a high level of privacy and anonymity.
One can always do more to protect oneself. If just a VPN isn't enough, one can switch to trusted open source apps instead or use the service entirely in a browser, but it may sacrifice usability a bit. If not enough, one can use apps or browsers with fingerprinting resistance, but there aren't many options to pick from, and some services and sites won't let you in if you try to conceil your identity to that degree. If not enough, you can disable all script execution like JavaScript too, and all dynamic loading of resources. This will remove almost all fingerprinting vectors and attack vectors, but most services and sites will break. If this is not enough, one can switch to using Tor Browser instead, but not only will most sites and services not work with Tor, but things will be slow, and you will have to login again every single time. But Tor Browser is so secure only state sponsored attackers can reliably deanonymize you or track you, and they need weeks if not months of targetting you specifically. And if that is not enough, you can always stop using internet altogether.
So it is all about choosing how far it is warranted to go. Getting a VPN is always the first step, and fairly easy to do, in the journey towards privacy and anonymity.