I knew this would come up. I am personally okay with it, or rather I choose to overlook it. What can be done?
Look, if you are on the internet these days, it is more than likely that your information/data is being harvested some way or the other. If you have a Facebook account, or Google account, and you use searches on Chrome browser while being signed in with your Google account, your information is being used by Google. Many sites offer to post comments using your Google or FB account, and many people do that, and so your information is being linked to you, and it will be used. Even if you aren't signed in to these accounts, still the searches made by your IP address are still linked.
There are many ways in which your information or your data will be used by companies.
I do not perform searches while being signed in to Google. I never post comments on sites using my Google or FB IDs. If I have to post a comment, if the site offers anonymous commenting, I do that... or by posting an email, in which case I post email created for such purposes.
I do not use Amazon shopping much.
I do not use FB much, and I never use its account to post on any site.
Your data/information will reach companies by any means whether you like it or not. You use the phone, and there you have an account, and so all activity you do is being associated with your account.
Unless you use VPN, or you are really careful and take various steps to ensure minimum data of yours is sent out, it is impossible to stop companies to harvest information about you.
I personally cannot afford to buy an antivirus every year, and also I do not want to.
In free antivirus, I think Avast is the best, which offers good overall protection. So many people still use it. It is a personal choice for me to use it. If you like, use it.. if not, then don't.
Even if Avast is selling data, why not point fingers at the companies.... big names like Google, FB, Microsoft and others for buying this data? The companies buying such data are as equally responsible as the seller itself. Google and FB are doing it for ages. Atleast Microsoft are upfront about what information they take from you. It is all about money in the end.