Something strange I noticed today. I had sent a transaction with a 10,000 satoshi/KB fee a while ago to consolidate many small inputs (https://www.blocktrail.com/BTC/tx/6c3dca0b37f69a154b7bd61a5c9b2613c3777e37c565d4801460f26d28158c3f). With the transaction fees being as high as they are currently, I wasn't expecting it to confirm anytime soon. However, to my surprise it was confirmed today by Bitfury even though the current transaction fees haven't been lower than 200,000/KB for a while now.
I am not complaining but I wonder if Bitfury (and maybe some other miners too) are confirming low fee transactions to fill up their blocks (so that nothing looks suspicious) while letting high fee transactions accumulate in the mempool and thus raising the fee estimates higher?