Methinks it's against the rules here at amiga.org to post those last two URLs if they indeed have these games to download.
Fact is, if someone is willing to still sell a ware, then it's not abandonware!
This is the problem with people who want to declare other peoples work abandoned. You reduce the viability of the business should they decide they want to sell it again or sell it with the assistance of someone else.
Amiga and Vulcan are giving people an ability to legitimately acquire these games. It's good to have legitimate means to acquire them because it presents the possibility that someone on the other end might keep track and see a viable business in that product and decide it's worth it to make future products. It also means that, unlike "those sites", there is a possibility that the people who created the content might benefit from people buying them instead of taking them.