ProtonVPN is playing games with me. It offered me 55% discount on 2 years plan, then I revisited the pricing URL and it offered 70% discount. Finally, US$71.76 for 2 years, sounds good. I updated the title and the prices. Some VPNs became cheap and some became expensive. To be frank with you, I hate this marketing strategy of VPN providers, there is more than 50% sale all the time, what's the point of that? Just set original prices and stop bullshit marketing and promotions.
Then ignore those companies that lure in new customers with discounts. Mullvad doesn't do it, vote with your wallet.
I agree with Loyce. It's a product afterall. The best way to show your disatisfaction is to ignore any product that you think has unfair pricing policies. In traditional investing, there is a saying that the companies who put large red arrows pointing at their investor relations section in their website should be red-flagged. It's not the same, but I want to point out that when you disagree with a pricing or financial policy, ignore it.