About footprints - on technical side there is not any footprint or trace from software, I am checking packets with Wireshark (between other things) but other kind of recognition and traces are very possible. DEFAULT RESOURCES in TAAC and other software's for creating accounts are problem, I think. Very few people are thinking about that, blindly using something that XXX users using every day on the same way.
Please post results after next changes:
-Make folder "Twitter Photos" and put it on the desktop, go to Facebook and take bunch of profile pictures from random unknown accounts, just drag them from the browser to the folder. Don't worry for their small size, twitter is resizing them anyway. I am taking photos with two or more persons on the picture, preferably male/female together so regardless the name used for account I have appropriate photo. Also don't try to drag only nice photos with beautiful long hair ladies; take normal, real life photos.
-Other photos that coming by default in TweetAttacks remove or at least rename and resize, possibly recognition footprint is there.
-Other possible recognition factor are names! Most of users just leave default names and surnames that comes with TweetAttacks. Guess what - Names in TAAC are overused, and for sure some kind of word-trigger filter exist, so go to Google, look for sites with baby names, genealogy sites, Wikipedia etc and collect lists of male/female names/surnames and put them instead of default set of names; I am sure that bitching about suspended accounts even before any usage will be drastically reduced. Scrapebox users can use name generator and copy lists to TAAC, or even better - to mix names from internet sources and Scrapebox generator. There are options for prefix and suffix, so make random 2,3 letter-sign-special sign combinations and use them. Anything, any change that is not made by default TA resources is a change to good.
-Locations - go to Wikipedia and copy/paste/edit lists of cities and use them. Try to match proxies and languages, for example its not normal to use proxies from USA servers, for location to put some city from France and to tweet on Italian. Simply not normal, anybody who actually visit profile will see what is going on and probably report profile.
-Biographies - something that match general profile theme and future tweeting. Its stupid to made bio out of some random quotes like "Shoot for the moon because even if you miss, you'll land among the stars" and later to spam them with ringtone offers, Amazon products or tech gadgets/tablets/ipads or whatever. If your niche is tech stuff, make your bio to be like "Tech news and updates coming directly from gadget lover and computer geek who loves to travel." Make full background and story like a real user, look through other user's eyes and try to catch all details that are triggering spam bells. Many of fake profiles going down not because twitter is all of the sudden smarter somehow, but because real people and visitors are getting tired of spammers and with a lot of joy clicking that "report spam" button in the corner. If you make profile that doesn't offend somebody's brain with totally misleading profile data, its a less probably that somebody will report you.