I am suspicious at the lack of a "pricing" tab. It's free of ads, they won't sell my data, they're "here to help me" - so who's paying to maintain this? Should

I am suspicious at the lack of a "pricing" tab. It's free of ads, they won't sell my data, they're "here to help me" - so who's paying to maintain this? Should I use this if I don't know it will still be around in 3 months?