If you want to be long SPY etf then sell an ITM put and hope for assignment. Perfectly legal in EU where buying SPY ETF is not. Read comments in link below.
I know this trick, it's pretty good and you can make extras just on options but AFAIK you must buy at least 100 units per transaction. You can sell them right after(like buy 100 then sell 70 to hold 30) but it's still not the same as being able to trade directly. Moreover there's always slight chance(hopefully not) that they will tighten regulations even more.
I will pay $10 to IB, even no trade or hold minimum funds to keep my account alive. Their TWS plateform tools alone give you more than $10 value. You need to review your post again.
I wouldn't be asking for IB LLC if I wouldn't know they are worthy. There's plenty of smaller US-based brokers who offer their services overseas. The thing is, proper introducing broker to IB will give you direct access to TWS, sometimes even directly through IB website. Also it won't be omnibus/jumbo broker that is holding single account @IB but will have separate accounts for each user. The whole service will be basically IB just with different fee structure. And as I said, for people that are EU-based there's just IB-UK not IB-LLC.