Csylochny attribute rel = sponsored, presented by Google in 2019 as an alternative to nofollow, use about 1 million sites. This was said the search employee Gary Ilsh in the first issue of a new podcast Search Off the Record.
Barry Schwartz of Search Engine Roundtable decided to see how they estimate the use of rel = sponsored in the SEO-community. To do this, he has created a poll, which asked to guess how many sites already use this attribute.
According to the survey, only 10% of the nearly 600 participants chose the option "million".
The largest number of responses gathered version of "a thousand."
Recall that in the first edition Search Off the Record Google employees also talked about the nofollow attribute and other issues.