UEFA's regulations actually do place limitations on what “related companies” can offer financially in terms of sponsorship. So that's a gonner.
It'll be a limit associated with "affliated companies" (i.e. a defined % share holdings). They will look at EVERY suspicious sponsorship, share deal, corporate boxing, naming rights - EVERYTHING in the club's accounts.
They can probably try and get round it at the edges but any flagrant breaches .... and ... the regulators UEFA (and their lawyers) are determined this era of over-leveraging and the advantage of English clubs (due to TV money and previous access to cheap debt) - is coming to an end.
Anyone not complying can kiss bye bye to Champions League football.