Ipanema by Gisele and Sejaa skin care by Gisele are not big companies. They are her own brands she has developed. You can add on Hotelier as well.
Gisele has been in the #1 position on Forbe's highest earning models since 2003/2004? Looks like not much has changed.
Modeling contracts include Pantene,Sky tv,Hope Lingerie,Fidelia,C&A. All commercial based which pay alot for any model, let alone Gisele. I've read many times Pantene and Hope contracts pay her a pretty penny. (Her Colcci deal she had from 2005-2010 was equivalent to her VS contract).
Now she also has her own clothing line deal with C&A, a soon to come Swimwear deal with C&A, and her Gisele Bundchen Brazilian Intimates.
I don't go by what "ifs". For the time being these companies have not stopped working with her and I don't think they will anytime soon. She has multi year contracts with many of them.