Sort:  

You can safely add Bitconnect too. Their fall will be epic.

I did not receive an email from them and did not have a withdrawal address in their site, so unless Control Finance requests an address to refund to, I do not have faith in what they have emailed to people.
I have put $100 in to Regal and they leave no way to either buy the coins or get a refund for me - I consider it lost.
I did also put a little in to USI-TECH and expect them to be gone before I can get my money out.
Gemini had in their contract that they will pay until the fees and expenses make it unprofitable and if this maintains beyond a certain amount of time the contract cancels out - I lost a bit a few years ago from them because of this. Their lifetime contract is only the lifetime that they give it, not your lifetime.
BitConnect looks like they actually have a bot trading which is why the payments vary from day to day. They wend down and could have disappeared hen but came back and I hope they last.
I have been re-learning how to do my own trading like I used to do in Forex and now that time is reopening up to me, this is the direction that I will go.

Bitconnect does not have a trading bot, they are just a scam like all other HYIP, the only difference is that they are more advanced. The days they don't give out interest are the day when Deposits to the platform are low. Principal is locked and no profit to withdraw. That's a strategy that will help them stay afloat a bit longer than other.
Wait until first initials deposits expire (around 239 days since most did not invest more than 5k in the beginning) then we will see if they will keep paying. Few more months left.