That's the difference between with MS and Google(i.e. enterprise and consumer), it doesn't matter how small the user base is, once a feature/product is GA to paying customers, you maintain it for a reasonable amount of time (>>> 1 year ) If you are not sure whether it will have usage/ interest, do your research , but once you go GA stick to it. Even if you are maintaining it for one customer, it shows the commitment you are showing to your customer , builds a lot of confidence on the vendor - Google doesn't get mine today.
* I meant the SLA for notice of deprecation not the lifetime of the product