I have got same offer, yesterday I had 45% bonus , black Friday offer from Bytro, I had a huge bonus one time when the launch of Mobil app came out, my biggest bonus as I recall for GM purchase was 100%, I have heard ppl say they got bigger offers, not sure I believe them.
I've gotten +100% offers quite a few times, including this time. It was a weird structure this time anyway, started at 20%, then 75%, then 100%, 20%, 0%, 20%. It's like watching a kid try to run a lemonade stand. You chuckle and smile but at the end of the day they're just terrible salesmen.