This is not correct. Stocks on AIM for example, or pharmas, can have huge volatility between news/reports and a figure like 7k is easily possible even on a modest account. That does not mean the above poster is a loser, just that he is (or was ...) probably waiting for some news or results to drive the stock forward. As for just "meme" stocks, they withdrew about 900 products.
What IG have actually said is that they have lots of new clients and need to refocus their resources. So effectively, they have withdrawn products types often used by long time clients in favor of new clients. That is completely irrational. Now they are going to lose long time clients. And ... when things get back to "normal" they'll be losing a lot of those new clients also.