Is it legal to use the APIs of Meetup.com, Eventbrite etc, to aggregate their event data into one place, similar to Google?

I have a predicament. I’m trying to build a platform that will basically be a place where all events, online/offline, are listed.

Initially – my platform will obviously have zero events, because nobody knows about it. And for anyone to use it – there needs to be events on there – classic chicken and egg scenario.

My thought was to aggregate events on to my platform (and link to their source), whilst also allowing users to create events on MY platform. Eventually, I’d be able to not bother listing events from other sources if mine gains enough traction. So, I am definitely competing with these sites.

Google is pulling data from many different events sources, and displaying it on their pages like so – https://www.google.com/search?q=events+in+london+meetup&rlz=1C5CHFA_enUA720GB740&oq=events+&aqs=chrome.0.69i59l3j69i60l3j69i65l2.4289j1j9&sourceid=chrome&ie=UTF-8&ibp=htl;events&rciv=evn&sa=X&ved=2ahUKEwiYtuPx2bLuAhU3REEAHaRkCZ0Q5rwDKAJ6BAgNEA4&sxsrf=ALeKk03Uj9jeI8lTj0__V-UWcgcv_pdFew:1611427139353#htivrt=events&htidocid=L2F1dGhvcml0eS9ob3Jpem9uL2NsdXN0ZXJlZF9ldmVudC8yMDIxLTAyLTAzfDE2ODA2NzEwNzgyNjAxNDg4MTQ2&fpstate=tldetail

The difference is, Google, I assume (?), is probably scraping the data rather than using APIs.

In the Meetup API Terms, it states:-

"Not use the Meetup API for any commercial purpose without the express written consent of Meetup;

Not undermine our commercial interests or make unreasonable commercial uses of the Meetup API, such as by substantially replicating our Platform or significant aspects of the Platform, to be determined in Meetup’s sole discretion;

While you may charge for any application you develop (subject to Meetup’s consent), you may not sell, lease, or sublicense the Meetup API;"

I know aggregating is a bit of a legal grey area but I wanted to ask for opinions on whether or not this would be legal, and if not – how the hell do I get any traction and users without having any content?

Note: This is in the UK.