Edited to clarify.
Things to consider: How much of your data would you be comfortable letting Lemmy sell vs Reddit? If Zuck treated users better, would you be more accepting of Meta monetizing your data every way possible? When it comes to using something for free (tangible or intangible) do you accept a company selling your personal information if their practices align with what you feel is fair?
I do not want my data to be monetised at all and I try to limit my use of services that do monetise my data as much as possible. This means that I try to not use Google products, for example.
In some cases, I feel forced to use it because the consequences of doing so are too high. For example, almost all my friends and family use WhatsApp. If I do not use it, I will be harder for hem to communicate with and I would miss out on a lot of stuff which happens in groups. I am not sure to what extent WhatsApp uses my data, but it is part of Meta and I do not trust Meta at all. However, in this case, access to my friends and family is more important to me. Although I am quite angry about it and I will get out immediately once there is a law that obligates messaging apps to be able to communicate with each other.
I would share my data for other uses, if it is in the interest of society. For example, I would share it for some scientific research.