Many have received payments from them. Personally received a total of 0.011 in three transactions.
At least they [Laxotrade] sent rather large amounts. I noticed another, BitSmart or something like that, who spammed the Blockchain with close on a hundred 1 satoshi transactions in one go. Not sure how many of these they did. I received four of their 1 satoshi payments but none of them received any confirmations. I only noticed them when I looked up those keys on BlockChain.info for other details.
I believe the bitsmart transactions are too small to ever realistically get confirmed by the network. I have seen several of these transactions while looking at various addresses on blockchain.info.
The laxo transactions have gotten confirmed and there are a number of threads on here about them sending out these kind of TXs. I personally think it is a very creative way to advertise their bitcoin related business.