If anyone wants more info, have a look at this link and associated articles: https://www.dataminingdna.com/guide-to-ancestry-dna/

One of the more interesting aspects is "You can copy your Ancestry DNA results to other sites to get more DNA matches. Here are the reputable sites where I personally have uploaded my Ancestry DNA results for free.
MyHeritage
FamilyTreeDNA
GEDmatch
LivingDNA
Geni
Although the upload is free, there may be premium features that require payment."
So one can access other DNA pools with the Ancestry results