Of course they did. Most Greek revolutionary leaders were Armatoloi in the service of the Albanian controlled pashaliks.
https://en.wikipedia.org/wiki/Armatoloi
So what? it lasted for 300 years and at this period greek kids were the main ethnicity that the ottomans recruited from.
Taking in mind that their numbers were always in the tens of thousands, that in fact means that the total number of kids abducted over the centuries were in the hundreds of thousands.
The Albanian pashaliks had a key role in the ''recruitment'' and taking in mind that circa 1800 Albanians weren't more than 500 000(in fact much less), the ''blood loan'' impact of those christian children was ENORMOUS to the genetics of the albanian nation. AS i said most likely because of Janissaries the Bektashis were a formidable community in Albania(probably the majority of muslim at some point in albania proper) all the way untill the commounist era and that inspite the ottoman violent persecution of them in the aftermath of the Ottoman-Albanian wars of the early 19th century.
Then you had conversions to Islam, which in what is today Fyrom, Kosovo, Albanian(and northern epirus) , and south Epirus meant incorporation into the Albanian nation, in the same manner that Becoming Muslim meant becoming Turk in much of the rest of rumeli. How many Greeks, Bulgarians and Serbs by converting to islam were eventually albanized, none can say with certainty, but the genetic similarity of Albanians at each respective place with their Christian(non Albanian) neighbors tells us that in must have been extensive.
Then you had ''adult slave soldiers'' like the late ottoman Mamluk corps. They too were of christian origins that ''embraced'' Islam as a mean of eventually gaining their freedom. Their numbers were so great that they were able to wrestle away from the Sultan most of North Africa(where many were sent to serve as ottoman troops)
And we haven't spoken of the ''blood loans'' due to females yet.
In summary, the Albanian nation , as i said before, it was shaped by the ''blood loans'' it received, and none of what i reported it can be challenged by a serious person with sufficient historical knowledge. That was how things worked in the ottoman times . All those i wrote are pretty much, historical facts!