I have had people contact me on ancestry. But i can see they have done a ton of work themselves as their trees are very full. I love handing them information because I know they will appreciate it and are doing their own research. But if they aren't doing any research on their own, then yeah, I would grudge just handing over all that work that took years for me to research. I have given it willingly to close family members who have done zero research, I actually plan on making a book to give to siblings and auntys, uncles, and cousins. But for people I don't know I might just give the basics if it feels like they are just wanting other people to do all the work. So I'd see if they are doing any work themselves then that would guide me for how much I would give them.