actually as far as i have seen in bullet specially, only ~1400 accept my seek(im 1600 bullet atm) so i tried setting my seek as lower limit: -1 upper limit: +400 and my seek didn't get accepted for 5-10 mins at a stretch.
I have a similar experience. Since changing the seek from -200/+200 to -50/+300 my bullet rating easily increased 100 points in one day, but I have to wait longer to get a game. And so far 9 out of 10 players rated over 200 points above me abort the game on the first move...
Lets see some concrete examples of players drastically improving their rating by constantly beating up on players rated at least 400 pts lower, lets say. As already pointed out more than once, you have a lot to lose (even if you draw) and practically nothing to gain from following this strategy as far as your rating is concerned, not to mention your chess skills.
For instance, I'm (over)rated @ 2132 playing a tnmt game with an opponent rated 1709 Here's the breakdown of what's at stake for me: Win: +3 Loss: -29 Draw: -13
Yeah overall I'd probably do very well (ie have a great looking won-loss record) if I didn't play anyone rated +1732 and might at least hover at about 2100 or so, but I wouldn't learn much and what's the pt? To amass a record of +300 -10 =25? I'm trying to improve my game and in general you do that by playing opponents about your level or higher.
Since I'm currently playing several first rounds in (more or less) open tournaments, I have some lower rated opponents and can easily top your example:
Rated - Win: +0 Loss: -39 Draw: -19