Or paying $15 for a year of someone keeping a content blocker up to date.
Maybe you are completely desynchronized from what people find valuable.
That you start valuing software at $0 because someone is producing it for free is a sad part of open source.
Revenue optimisation is a different concern. Would they sell more if they priced it at $10? Maybe. Would the total revenue ($10 * number of users) be higher than now? Maybe not. There is a local maxima and it appears that they calculated this to be ~$15.
adguard is free and I don't think I've encountered an ad that it didn't block. There's also open source adblockers like ublock origin lite, and some other one that was mentioned earlier this year but I forgot the name of.
Yet not "every user has switched to these free products". Apparently the consumers don't feel the same way as yourself, or they are not aware of those options (marketing costs, too). Hence (quoting myself):
> A product justifies its price tag as long as people are willing to buy it at that price.
I'm not a 1Blocker user, but 1Blocker definitely doesn't have to price match anyone else if their customers are happy to pay despite there are many free options.
If your time has so little value, please do create an alternative and offer the same level of support and updates for a price that seems more fair to you. $0.50/month maybe?
This thread is literally about someone providing a free alternative.