KTR does not even have a tuner.
TDC is not open I believe and doesn't have a dyno for sure. They have made posts of this nature on NASIOC and LegacyGT.com.
DSG has been $500 flat rate for a tune for well over a year at least and if you continue modding it's less for updates/retunes thereafter. My car was on the dyno for 4-5 hours easy and it was $500.
XX trying to upsell product well... who cares, their job is to make profits. They will still tune whatever you bring them, not to mention the OP will be running an APS turbo so I guess they would have no excuses on his front! Chris has left their shop as well and is doing freelance tuning. I do not know if they have hired a full time replacement or are now contracting him as an independent.
Have you really been shopping around for Subaru tuning options in the last year since you got rid of your STI? I doubt it. Obviously it's a rough go for a shop of this nature in this area, and the landscape is constantly changing.