Thanks for great info.
I purchased Accor plus membership in the month of November as I had Singapore visit planned for Dec / Jan time. Singapore has lot of properties with Accor plus. I paid with card for Accor plus explorer with one free night
When I entered the details location as Bangalore, I got lot of Bangalore vouchers (Novotel+ Grand Mercure + ibis) + Mysuru vouchers (Grand Mercure) + Kochi Novotel infopark vouchers + some Goa Novotel food vouchers
Some of these vouchers are useless as they are applicable if you are dining with 6+ members. But some vouchers are really useful (like free lunches / Dinners in Bangalore properties etc, and free / discounted spa at Tatva spa)
Best part is the free night stay. I used this for Swissotel Singapore and value of free night I received itself is far more than price I paid for membership. However, lot of times for booking Singapore properties, it gives message that stay plus is not available. You need to keep checking and once in a while it appears. You need to be quick in booking it once it shows.