[mytailorisrich]

It must be said that in the UK property is governed by specific law and specific rules. These may vary per country (E.g. Scotland vs England), I'm only familiar with England.

For example a contract to sell/buy property must be done by deed, which among other things requires special wording and witnessed signatures.

Owners are also registered with Land Registry and there is a limit to 4 legal owners. If there are more owners a legal instruments like a trust must be setup in order to create beneficial owners.

Bottom line: it is not simple. Whatever this website allows to sell and buy it is unlikely to be actually shares in properties, but rather some contractual rights to receive a share of profits based on level of investment (however that might be calculated as it's not clear), like property investment funds, which this effectively likely is.

Values of properties do go up and down. How can they adjust on a daily basis? They cannot. Best one can do is to hire a Chartered Surveyor every 6 months or so to get an independent valuation.