I believe that it is more like the same situation. We have had bounties back in the years that didn't pay after the campaign was completed and now we still have some Bounty campaigns that still don't pay after work is done. Asking for KYC is now the biggest scam in the bounty campaign space that was not specified before the campaign because they know most will not participate in that campaign not because the hunters want to scam you but because they don't want to give their info which the projects is now forcing them to do to get their pay.
I guess the matter is subjective because some people pick and choose the campaign we participate in.
One of the main reasons why they are asking KYC these days is the fact that there are more than one account per person and they are worried that the same person will get multiple entry just because of it. If you do not want to do KYC for a project then you should not enter at the start, and even if they didn't say it, assume that they will ask for it.
The main reason stands, it is a good reason, if I open 10 twitter accounts and 10 bitcointalk accounts and whatever else is needed, should I be joining with 10 accounts? I should not, and KYC is there to prevent that. Not a good thing for most participants who do not want to share it, but a good defensive mechanism for the campaign.
Also, I have a completely different opinion than @KaliLinux. It is the KYC verification (which I don't like) that make difference of legit projects from scams.
Scam project doesn't care how many multiaccounts take part in the bounty campaign, because they only care about spam and making as much fuss as possible. This project that requires KYC ensures that their tokens go to real people who will become part of the community, not just bots.
As I wrote, I don't like KYC. However, if I do very good research and I am convinced that it is a solid project, then I do the verification. After all, no one has to take part in the bounty if they do not want to pass KYC or if they are not sure that the project is legit.