Remember £1 is ludicrously cheap. I think the next cheapest in the UK is about £5-6. It takes more than £1 of your time to work out which stock to pick. And a lot depends on how much your stake is. This micro-investing is all very well, but if you have £50 in your portfolio, and you do really really well, you might make a tenner in year.
Having said that, it’s a good way to start. Losing even pennies makes you think ‘why, what did I do wrong’