Your oshi doesn't need YOUR money. A hundred more paypigs are more than willing to dump their college fund at her. The only support she needs is to watch her videos.
Memberships are not necessary to support them and should only be bought if you want the vanity of a loyalty icon, and are interested in her membership streams.
It doesn't matter how great your love her is, because she will never directly improve yourself. You can however use her as an inspiration and channel your passions to achievable goals.
It is not morally wrong to use VPN, and piracy is not a lost sale. Feel free to use VPN, pirate her content, or whatever else you want. You need the money more than she does. That is a fact.
There is no ethics in media consumption. All is fair in love and war. Restraining yourself with ethics or fairness sabotages your own self-interest. Exorcise your mind of spooks.