You've been vaping less than a month. Most people don't have leaking issues immediately.
The majority of people that use tanks have leak issues. To be honest, I've yet to read posts from more than a handful of people that are still using tanks at the 6 month point. Even the three month point.
If you watch closely at the video reviews, most of the glowing reviews come from people (who get them for free) who have been using them an hour, a day, maybe a week, tops.
If you don't have problems with them great. I hope no one does because the tank kits are expensive and who wants to waste money?
It should tell you something that the very same vendors that sold tanks when they first came out offered warranties. Now there are zero warranties on tanks and tank attys. I know because I was fortunate enough to get a tank and tank atty and was able to return them because mine were under warranty.
Not quite sure I understand as the tank cartridges are disposable so I'm not sure what effect the passage of time would have on whether they leak or not.