My views from the outside. I reckon that Thorney/TIGA (sometimes) identify businesses they like that are capital constrained & then take a position such that an equity raise needs their support, which means they are in a good position to negotiate when the business runs out of cash.
So their being on the register might be a good thing because they are an investor with capacity to invest - but it might also flag that some smart guys reckon the business will run out of cash, and the squeeze play is on.
In the case of MRG - its seems that the strategy is to shift from being an ag producer to being a FMCG brand. That may well be a good strategy, but I have never seen MRG *ever* do anything thing it set out to do. Can Tiga/Thorney help with execution? I wouldn't have thought so but maybe they have expertise they can bring to bear?