Learn English – Do you “buy on” or “buy from” online webshops

Your use of the conjunction "since" in this case is helpful to the reader. What may be less clear is that you're telling her that type Y and Z adapters will be an adequate replacement for type X. Perhaps being more direct about that point will make the language seem better formed.

I believe this type of thing is called a "loss-leader" - supermarkets use the tactic to draw consumers in on the promise of a few of their product lines being cheap - knowing that in the course of their shopping - customers will probably buy other goods at higher prices. Another description is that of "upselling"which is another tactic used by online retailers who tempt buyers with a small purchase and then - at the point of ordering - try to sell additional items which are usually higher in price.