Some of these bid-bots are just getting too big. Their masters are becoming too powerful. Even worse, people are making posts just to bid them up for a quick return, not even to get attention to their 'content'. It's why they are so upset when they don't get their ROI. 
Anyone who looks at Steemit quickly sees posts trending in 'all' valued for hundreds of dollars. Then, they want to see what all the attention is about only to find someone with a rep below 50 with less than 1000 SP. The person has no apparent allies or curators and is just posting something uninspiring (to use kind language) with little to no purpose having tags that are so broad and general.