Here in the UK*, if you are not selling brand-new items, there is no realistic alternative to ebay.(except books: amazon uk..).
There's no way I'd make as much money on say, cqout, as ebay. I've tried.
So we have to put up with this crap. And it is crap.
Putting "DSR begging" in the listing is demeaning. I'm certainly not going to do it. It's up to eBay to explain this properly to buyers.
Not meaning to be condescending here, but I'm not making any judgements on my buyer's academic abilities. If I sell a workshop manual for a car, it's likely to be bought by someone who fixes cars, and is not likely to be interested in reading a rambling passage about DSRs. If someone doesn't post feedback, I'm certainly not going to bully them into it. That's asking for crappy ratings.
I am going to slightly modify the "dispatch notice" e-mail in selling manager to mention DSRs, and suggest that buyers go for 5 rather than 4. However I don't expect anyone will read it.
Amazon is far more laid-back about feedback, "buyers will leave feedback if they feel like it". I know who I'd rather deal with.
Oh, and I have 100% feedback on Amazon, eBay, and cqout, just for the record.
*UK = United Kingdom. United? Don't make me laugh!