You’re still adding views to the video and engage by liking which is good for the influence metrics. Google uses that to ask for higher prices to show ads on that video. Well, they give the influence metrics to advertisers and they have to decide themselves how much showing an ad on this video would be worth for them. It’s like an instant auction, there is no fixed price. So, while you are freeriding, the compensation of you not seeing ads is mainly covered by advertisers.
To be clear, advertisers are not paying more because they pay Google for an ad that is blocked (that’s not happening), they pay more because Google uses your views to tell advertisers that this video is a good investment.