Who am I to tell you how to spend your money? The point is, there are alternative unlike what you claimed. There is currently no foolproof way yet for Google to block apps. Also, it doesn't matter, in the long run - once the adoption of Sailfish OS picks up and it reaches critical mass, developers will switch to building apps for it. The "digital sovereignty movement" also helps. Russia has already bought and forked the source code of Sailfish OS and adopted it as its "national" state-sanctioned mobile operating system. This has had a ripple effect where many Russian apps have now been ported to it. China too has already forked Android to create its own "official" OS and most Chinese apps now also work on it. Similar attempts are going on with other countries too, who don't wish to be trapped in the duopoly that is Apple and Google in the mobile phone industry.