I had no idea why so I wrote the seller and asked him. He said he wasn't sure why but he does know that ANYONE can request a buyer be blacklisted for a refund and that that is probably the reason. (He was selling as an affiliate for someone else's product.)
I looked to see how many refunds I had requested and found this:
*NO REFUNDS of JVZoo payments
*5 refunds from Clickbank. None of those were WSO's except for 3 which were but they were from overpayments. That is, somehow Clickbank billed me twice for one WSO and 3 times for the OTO and so I had to ask for refunds on the over-billing.
Another Clickbank refund was from a scam where an IMer basically charged me for a subscription service even though when checking out I declined the subscription service. As a result of that dishonesty (and poor performance of the software) I refunded both the subscription and the original offer. This was NOT a WSO but an offer I got in my email. This is the ONLY product I have ever chosen to refund based on not liking the product!
Now I would not blame anyone for blacklisting someone who refunded, say, 20% of all purchases or something like that. But I have bought probably 50 WSO's and never returned any just because I tried them and didn't like them, the only one was as mentioned above - a refund with good reason, and my % is about 2% if you do not count the double and triple billing described above (and Clickbank clearly acknowledged that those were refunded due to overbilling).
So the point of all this is that JVZoo really should not blacklist people just based on the whim of some IMer who doesn't like you because you refunded or gave his product/service a bad review. I suspect that this was done out of spite by the one IMer above who did scam me and others into buying his pos software and did bill me for a subscription I did not order.
JVZoo should require documentation as to your refunding too much before they blacklist you!
I asked JVZoo if I could appeal their decision to blacklist me, and did not receive ANY response from them.
One reason I am posting this is to make sure others realize that JVZoo does this and that while WSO'ers and others offer "money back guarantees" you should know that this does NOT mean you can get a refund with impunity!
It is clear that even if you do not ask for too many refunds you can STILL get blacklisted, as in my case.
Which goes to say that it is best that you be absolutely certain you want a software/product/service before you buy it because refunding it under the "100% no hassle money back guarantee" may cause you to be blacklisted as I was. I suggest you do as I do now: read the reviews very thoroughly before buying and do not buy unless the seller is someone you've heard of and can trust. Otherwise you may want a refund and that may get you blacklisted by a vindictive seller who didn't like your request for a refund or your (justified) negative review.
At the very least, JVZoo should consider a buyer's appeal. I would be happy to show them my paypal list of refunds over the past 12 months with explanations as above so they could see I am not deserving of blacklisted. But they would rather, apparently, ignore me. In the end it will be their loss more than mine, in this case.