Yes, I am aware of their presence. However, they were not the reason I acquired it. Thrifty is a well known term, and it has imo a very catchy meaning that fits the app extension perfectly. Other businesses are using this term as well, so I will be holding on to it without doing much outbound to begin with.
Now, the Thrifty car rental service is known for registering domains in each country they operate in. They might be interested, but lets see how popular the extension becomes.