I think bid bots are here to stay, unless there are major changes to curation rewards. The reason why all the major sp stakeholders are delegating to bid bots is simple, for profit. Because the current curation rewards are just too low and unattractive, using bid bots is the easiest way for them to earn passive income from their sp stakes. In the past, before bid bots, these high stakeholders will curate posts or follow curation trails, they earn 25% of their upvotes. But with bid bots, they now stand to earn up to 90%. So unless curation rewards are adjusted higher, there is simply no reason for them to not use bid bots.
It had been a while since I last used a bit bot. Those that I use and support are @smartmarket, @buildawhale, and @minnowbooster. These bots owners not only provide bot service, they are also active in the blockchain, fighting spams, plagiarism, and creating blacklist that is beneficial to the steem community.