Can you be a little more specific?
1) As far as I know, you can insert, the problem is that the size of the container is not defined. Can this be a problem?
To be honest, I haven't done it myself, but I'm going to try it today.
2) What are the legal affiliate materials? Are there any legal CPAs that pay for banners?
The consultant and the feedback form I already have, but if they were not, then IMHO it is not an option to insert them in this way.
Another question, I've seen sites insert product displays (widget) from Yandex.Market, i.e. some product and left-right arrows switch to other products. Can you tell me where to get such a widget and whether it should be put on a legal site?
Or enough to be limited to Yandex and Google, well, even mytarget can try (he did not use).