Oh right, that’s interesting. I doubt Matt will be of interest to the other housemates so I don’t imagine it’ll be mentioned.
Even if MTA doesn't get mentioned on the show, the tabloids are very likely to pick up on the fact that Lewis was one of the main men in the MTA fraud for some time (even if he was an unwilling participant as he claims). Either that or a pi**ed off former student will sell a story about Lewis and Matt - one way to recoup the money lost to MTA.
Lewis is already going for the badboy image (drugs, arson etc) so I don't think he's going to shy away from burying Matt and his shady past.