not only google that lift the ban, twitter and facebook also lift the ban. I do think the main reasons is, cause crypto is started to be considered as an inovation and many people think crypto have a good use. People start understand that this is the new businesses and its wrong to just ban it just because you are afraid about it.
They've realized the bigger market that crypto can bring to their business so they need to removed this ban thing and start to allow crypto back
to the advertising business, maybe they are also planning to move forward and embrace the system and make a big use out of it.
Well, I'm sure big companies have realized the commercial benefits that crypto can create for them but in the past, they could not optimize these benefits when the government always monitored their actions and crypto was not really popular during that period, they are forced to ban crypto to please and express their attitude to the government. However, when the crypto world has become more developed, the government also has a better view of it, some countries have opened doors to welcome crypto, taking advantage of this opportunity, large companies also terminate the ban and make money through a number of activities with crypto