I know, my point is this doesn’t give you the right to pirate the app. You have legal ways to fight it: request a refund, report it to the store, write a review, advocate for an open source alternative, etc.
> legality
Does patching out the license check not, in this case, fall under the "interoperability" or "abandonware" clauses of the DMCA?
People have shared that many of those things didn't work, developers don't care about reviews of an abandoned app, refund process probably costs you more in time than you would get, and Google is not really known for their good support.
You shouldn't go through that much effort for something you already paid and obviously malicious/unethical approach caused you problems. If there are things in favour of piracy, it is in cases like this.