Google usually perform spring-cleanings. Usually announces around march-april which features will be removed, and by july-august performs removal. However marking a feature as deprecated does not necesarilly mean immediate removal.
Also, maybe this is related to Google G-suite marketplace: https://gsuite.google.com/marketplace/
BTW: in any situation, combine something that “is crucial to our operation” and something that depends on a closed SaaS or cloud plattform it’s usually not a good idea, except if your data/services/developments can be moved to other platformS.