If you invest 1 BTC in category 4, then you get the maximum coins possible, you don't need to join the free giveaway then. But other than that, yes, you would have!
The 2.5BTC anon investments in category4, are they still valid?
Which category would give me the best ROI as things stand now?
as it stands category 4 will give you 100,000,000 coins for your 1 btc investment, this is the best option for best amount return. 1 satoshi per coin in this category. while its about 1.2 maybe 1.3 sat in other categories some more