I'm less pessimistic then you are. Even when we have great (mostly political) forces against prolonging life, I actually think that the big pharmaceuticals will actually want to earn a lot of money for life extending medicine. Most big corporates are in it for the short term, and on the short term, these companies can make a lot of money.

And even when the big companies do oppose the prolonging of life to 100s of years, there will be new startup companies jumping on it to further research. Next to that we have all other developments like AI, AI integrated with human brains, downloading the human consciousness and so on. Meaning, at many levels of technology we will see steps towards possibilities of eternal life.

Of course we can debate if we really want humans to live for 300+ years and longer, since this will have a dramatic impact on the scarce resources we already have; But that is a different question and debate.

The solution presented with the link you provided. Interesting to say the least. Since this is on offer, I'm sure some of use actually buys the system. It always starts with a very very small group, the real innovators. Over time, these type of solutions will become more known by the public and more people will actually start questioning of they want to use such solution, or not.

The question to you is: Would you take the pill that gives you eternal life?