Like, If I found a exploit for something random like skype/slack/etc.. that let you run code on any targets machine with zero interaction, there is zero chance my first stop would be the bug bounty program. For serious exploits, I believe you can get up to 2 million bucks with zerodium. Just seems like a no brainer.
Now that said, I would definitely use the bug bounty program for boring/low impact stuff like XSS and whatnot that has limited value/impact as nobody else would likely ever buy it for that much higher of a price.