The contract/tos/eula will then have to be examined by a contract lawyer, and then you have to prove the contract was violated etc etc.
Lawyers are pay per an hour, every expert is pay per hour, judge, court, etc.. it ads up fast.
btw: nice projects
It's even more complicated than that. You're talking about a niche area of the law across multiple jurisdictions. Your average "first consultation free" lawyer isn't likely to have expertise in the area of digital goods and services, let alone be familiar with the inner workings of contract law in other countries. You'd literally need to hire a local lawyer to assess the merits of the case in each jurisdiction where you're considering taking action. Even if you did somehow manage to find a lawyer willing to take the case on contingency and you did prevail in court, enforcing a judgment is another matter entirely.
From a lawyer's point of view, it's not going to be an attractive case to take on contingency, both because there's no 'deep pockets' defendant and because it's highly likely that the company's assets are located in a safe haven which won't domesticate the orders of a foreign court.
While I'm sure a private investigator can be found who's willing to take money for trying to track down the location of "Tom Williams", I question whether they're any more likely to come up with concrete, usable information than 4 chan would given the same starting point.