Can companies like Cambridge Analytica use data from a third party app to harvest the data of 50 million Facebook users?

No completely legal - this is a political/media red herring. Google search use of data by campaigns, started with Obama back in 2012. These...

It might. You should discuss with the school. You have to show you can support yourself (or your family can/will) during the course of your...

Unites States

You need to provide more detail or ask a complete question. CBP took what off? Are you referring to seizing goods or merchandise?

Does one have to be outside the USA to qualify for the International Entrepreneur Rule (IER) ?

No. If you are on F visa there are other options available including H-1B, E-2 and some immigrant visa options. When properly structured you can...

GDPR - does it apply to someone building a product in the US but has one EU citizen who is user?

Yes, the GDPR applies to any business no matter where located that uses personal data of any EU citizen. Enforcement starts in May. There are...

How long before my priority date is current and i can get visa?

You can check priority dates here: https://travel.state.gov/content/travel/en/legal/visa-law0/visa-bulletin/2018/visa-bulletin-for-march-2018.html

You can travel freely with the I-131. You also do not need to use it or if you do not, you are not required to return it.

Follow the directions on the form or consult with an immigration attorney. You list the address they ask for, which would be your permanent address.

What will happen when i exceed my time in usa?

You don't say how long you overstayed. If more than 6 months there is a 3 year ban, and if more than one year 10 year ban on re-entry.

Can I extend my current J1 if I apply a waiver for a previous J1 visa?

You should retain an immigration attorney to advise. It will be necessary to review both J-1 visas, the basis for the visas and basis for waivers....