It doesn't bother me much that crossover ads are appearing, but the downside is that if there are a lot of crossovers posted, it pushes legitimate ads back to the next page. Bad thing about that is, many people won't sit and read ads past the first or second page, and doing a search may not be helpful, since people use different terminology in their part descriptions.
Nevertheless, you can always go to your ad posts and BUMP them back up to top so they will appear on the first page.
However, I have had people inquire about ads I have had in the for-sale section a zillion pages back. They must have used the search feature to find it and lucked out!!!
I do try to use official shop manual terminology in my parts listings unless there is a specific reason I can't do it in the space allowed.