I used to pay for Norton antivirus every day until the free "Active Virus Shield" offered by AOL which was really rebranded Kaspersky. Then AOL no longer works with Kaspersky, so I switched to free version of AVG as I had already get used to the freebie. Over the years, I switched back and forth among the freebie programs which included AVG, Antivir, Avast, etc. Right now I am also using the paid version of Kaspersky. I paid for one license for three computers while it was on sale for only $26 if I remember correctly, and I think it was a good deal.
As for Malwarebytes, they used to offer "Lifetime" license for $10. You could pay just $10 and own one license forever. A few years ago they switched to subscription based model. Now you have to pay them every year to keep the license working. It is worth the money if you are a heavy internet user.
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