I bought up to YDNA 67. What's the highest match? 100-something? I have been tempted to buy up to that level when the next sale comes out... but my suspicions are that it wont add anything more than what I have now. I could be wrong but I think for someone to be more than YDNA-67 match, they would be a direct relative within a few generations and those are people I know... and I have more than I need already. If I was adopted and trying to find direct relatives, I would probably pay for the highest I could get. I think I would rather spend the money and get more packets in order to get other cheap SOB relative males to become part of the data base, and the responses would then come back to me.
The Cherokee cousin several times removed could likely be a 37 or 67 point match (According to our family oral history, supposedly, we have three separate lines of Cherokee but that is not unusual with a linage of four hundred years in the south, esp with Scott/Irish background. For whatever reason, the Scott/Irish and Cherokee seemed to intermix a lot). The way I see it, if a person is a high match, they will also be a 37 or 67 pt match as well and I will get an email notification regardless. Your YDNA-37 could still pick up a guy that is many generations and hundreds of genealogical years removed like I am with the bloke in England (that's an assumption; there were several migrations of our surname including one group in the 1800s through New Orleans).
I took my FamilyTreeDNA test about a decade ago, if not more and I still get weekly notices of matches; got a YDNA-12 match notice yesterday matter of fact. I generally dont chase after YDNA-12 results until I accumulate quite a few of them and check them all out at the same time. And, every once in a while I will get an email directly from a person outside of the FamilyTreeDNA automatic response. Once I got an email from a guy form Hamilton, TX (or that is what his profile said) and we are definitely related (37 pt match). Hamilton is a short ride NW of Gatesville. He hadnt done any genealogy work so there wasnt anywhere to go with the information. I told him the surnames of my ancestors buried in the cemeteries up in that area and if he finds something that matches to let me know. Low and behold, we ended up stationed at Camp Liberty in Iraq at the same time and had lunch a few times. We are definitely related somehow but we just cant figure out how just yet. That never would have happened without taking the FamilyTreeDNA test.