Reminds me of a nigerian scam artist who wanted to deposit 25% of his uncle's million dollar stash in my account at no cost to me ... so I strung him along.
I went back and I demanded 35% ... he said "OK". I hit him back with an email and said it took him too long to respond and now it was 45%.
The idiot said "Yes" ... so I said "nup, now it's 65%" ..... he finally cottoned after further emails that I was annoying him a lot more than he was me.
I hadn't finished with him so I kept demanding he now send me 100% plus another 20% penalty for my effort in typing out emails.
Three weeks solid of daily emails back to him, took me 2 seconds to type (just copy / paste) with some appropriate language ...
I NEVER got another email from them or anyone else again.