As a matter of principal, I've never used an ad blocker. I know how the internet works, how it's monetized, etc., and I fully support websites that I use and want to continue to have available. I occasionally even click on semi-interesting ads for no reason, just to throw a little money your way.
But FT's implementation of its ads is making me consider getting an ad blocker, if only for this site. No other site destroys my system resources like FT does. If I get on here and open up a few tabs at the same time, it's not unusual to hear my CPU fan go on. This is a system with an i7 and 16GB of RAM, and your website has a noticeable performance impact.
Just throwing that out there. When your ads are driving people to use ad blockers because of performance issues, there's something wrong. Blocked ads aren't going to make anybody money.