I'm sure like many turkers here I only do batch hits and very rarely do surveys. Can we please have a separate "Greatest Hits" thread for batch hits?
I think most people do both if the pay is acceptable and I don't think most people want to have an extra tab to be checking/refreshing/following. I don't think the interest is there.
I agree with DB. Also, batches are easier to find on your own and less likely to be shared in general, since every extra person that's on a batch means less hits per person.