Thanks for bringing this to our attention. I’ve now added

// Removes Woocommerce's offensive advertising
add_filter( 'woocommerce_allow_marketplace_suggestions', '__return_false', 999 );

to the functions.php file of all 6 WooCommerce sites that I maintain.

This is a worrying trend from Automattic – first Jetpack, now WooCommerce. What’s next? Pushing their commercial agenda in the WordPress core itself?