It have been noticed that adsense team is not ready to clarify whether publisher's can use use blogrush. I have observed that many adsense publisher have asked them regarding bogrush and they only have on answer to it " be away from such kind of program". So don't be surprise if you get email from google adsense about blogrush.
Here's another thread I participated in about this subject: http://www.v7n.com/forums/blogging-forum/68208-adsense-against-blogrush.html Apparently AdSense don't "encourage or endorse the use of a program like this, thus we're unable to give specific advice regarding BlogRush." That in no way suggests they might ban your AdSense account if you use BlogRush. Scaremongering you are.
It's no big deal to me if they baned it, I've only gotten 12 hits off it so far. (12 extra hits, so I keep it on.)
i guess that would apply to Entrecard as well? if they don't like blogrush, they must not like entrecard either. i'm using ecard currently and not sure whether to continue using it. i guess i will continue to use it until adsense come up with an official announcement or update their TOS. till then, its legid even if they don't like it.
i don't remember reading on the TOS regarding entrecard. can you please show us which part of TOS has mention of entrecard? this is something from entrecard forum: http://entrecard.com/forums/1/5967/ and i have the same experience. i do get some traffic from ecard but its very poor quality traffic with high bounce rate