The wrapper is the whole question, and the three answers behave very differently.
A Regulation Crowdfunding offering runs through an intermediary that must be a registered broker or a registered funding portal, and it is open to anyone, subject to per-investor limits set by federal rule and based on income and net worth. Disclosure is filed with the SEC and the offering is capped. The mechanics and the limits belong to the crowdfunded investments page rather than this one.
A Regulation A offering requires the issuer to file an offering statement on Form 1-A, which SEC staff must qualify before any payment is accepted. Tier 2 offerings carry continuing reporting on Forms 1-K, 1-SA and 1-U, and where the securities will not be listed on a national securities exchange, an investor who is not accredited is limited in how much they may invest. A Regulation A offering marketed as real estate crowdfunding is often a non-traded real estate investment trust, and where it is, the analysis that matters is the non-traded REIT analysis: estimated valuations rather than market prices, and redemption programs the sponsor may limit or suspend.
A Regulation D private placement involves no SEC review of the offering at all. The issuer files a notice on Form D, and participation is generally limited to accredited investors. In real estate this is usually a syndication, meaning a sponsor forms an entity to buy a specific property and sells passive interests in it. The structure of that arrangement, and the sponsor economics inside it, is a subject of its own.
The platform is not the issuer, and under federal rule it is not your adviser either. The SEC's definition of a funding portal at 17 CFR 227.300(c)(2) describes a broker acting as an intermediary that does not "offer investment advice or recommendations," does not "solicit purchases, sales or offers to buy the securities displayed on its platform," does not compensate people for such solicitation, and does not "hold, manage, possess, or otherwise handle investor funds or securities." So the curation a platform appears to provide, the selection, the ratings, the presentation order, is not advice and cannot be relied on as though it were. It also means the platform is not the counterparty: the money is at risk with the issuer or the sponsor, and a platform that closes does not, by itself, tell you what happened to the investment.
Where no market exists, someone has to say what the investment is worth, and that someone is usually the sponsor. A listed security's price is set by trading. A private or non-traded real estate interest has no such price, so the value an investor sees on a statement is an estimate produced by or for the party managing the asset. That is not necessarily wrong, but it is not independent, and it is the reason returns reported on these investments should be read as estimates rather than as realized results until there is a sale.
Getting out is a separate question from getting in, and it is the one the marketing answers least clearly. These interests do not trade. Where a redemption or repurchase program exists it is typically limited in size and discretionary in operation, which means it can be reduced or suspended at exactly the moment investors most want to use it. Before committing money the questions worth answering are what the stated holding period is, what the exit is expected to be, whether a redemption program exists, and on whose discretion it operates.