You can get £10 free from Seedrs to invest in one of the crowdequity campaigns on their site by clicking this link: https://www.seedrs.com/signup?promo_code=D74RER6A (yes, that is an affiliate link thing - we’d both get £10).
There are some terms for that offer: “[You’ll] receive £10 free investment credit after successfully investing £50 or more within 30 days of signing up to Seedrs.” I’d guess it doesn’t work if you’re already a Seedrs user.
Now crowdequity is obviously vastly higher risk than, say, buying an index tracker. So it is not for everyone. But if you wanted to try it out with £50 you can get an extra 10 from them. I think of crowdequity as fun bets, and I never do it with >0.5% of assets. I quite like Ripple - a wind farm thing - at the moment.