Ya correct. If the company doesn't disclose where they are investing in and how they are getting returns. Then we assume these companies just run away.
It's not only with telegram, it can be on any platform.
There will always be a risk when you are building a new telegram bot for people to gamble, what you may not realize is that when telegram first started to be famous in crypto world there was a lot of casinos and games and stuff like that which told people they are giving away money and for a while they actually did but when they gained some reputation they ran away with the money and didn't pay anyone.
It means there is tons of people out there who will see telegram bots as scammers right from the first second, that is why it is so hard to convince people to come join your telegram bot because they already made up their minds even before they saw your bot. Secondly it is lottery which is really not a greatly loved game in crypto world, not like dice or sportsbooks which are loved, lottery has been tried many many times and never really succeeded.