I think those cookies should be the other way around. The person who closes the deal should be the one to get the commission. If I was a car salesman and tried to sell someone a car and they didn’t buy from me but went to another salesperson and purchased the car from them, that person should get the commission, not myself just because I was the first person who tried.
I hate affiliate programs that do that. I could use a whole bunch of cookie stuffing techniques and get my cookies set on thousands of online gamblers computers and steal the commissions from all the honest affiliates out there that actually put in the effort to generate the referral. Thats the kind of program that invites this behavior from black hatters.