Yes and no.
Memory for transformations comes from the SSIS server, but you'll use some resources from the other servers to read and write. If you have complex queries, that would use resources from the the source server.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2