Here's a snippet of HTML from Facebook advert https://imgur.com/Wx8rIOm.png
Just for "Hydrow <blue_checkmark> Sponsored" is the following HTML
<div class="xb57i2i x1q594ok x5lxg6s x78zum5 xdt5ytf x6ikm8r x1ja2u2z x1pq812k x1rohswg xfk6m8 x1yqm8si xjx87ck x1l7klhg x1iyjqo2 xs83m0k x2lwn1j xx8ngbg xwo3gff x1oyok0e x1odjw0f x1e4zzel x1n2onr6 xq1qtft"><div class="x78zum5 xdt5ytf x1iyjqo2 x1n2onr6"><div class="xjm9jq1 xg01cxk x47corl x10l6tqk x1i1rx1s x13vifvy"></div><div class="x1xmf6yo"><div><div><div data-visualcompletion="ignore-dynamic" style="padding-left: 8px; padding-right: 8px;">
Also, attempting to highlight "sponsored" also jumps back and forth because their scripts basically jigsaw the letters together from bits. And, almost all of their content on pages look like this. My guess is to jam up adblockers. But it also screws over anybody with visual difficulties (reduction of visibility to blindness).