What is the reason why deleting posts is not allowed?

I see no reason for that.

Maybe with a better reputation/trust system everyone should be allowed to.

Yes, I agree, there's no reason for not allowing users to delete their own posts. I believe such feature should be allowed so users can delete the posts that they find unworthy. I'm referring to the type of posts that OP mentioned in this thread, if the creator of those posts isn't allowed to delete his/her own posts then someone has to get privileges to delete such posts and warn such users so they may not create such posts in feature.

I know that burning of ALTT token is essential to keep forum working properly and to add some liquidity to that token but I also believe that some feature should be granted to all members especially when it comes to deleting of their own posts. The users should not be allowed to delete their topics/threads any default but they should be allowed to delete their own posts/replies like they are allowed to do on other forums.

I repeat, there are good ideas on Btt that could be transferred here, or at least something similar. Various competitions, contests, etc..

That's what I asked for, and I believe those ideas would be quite helpful without any doubt. Yes, I'm active on Bitcointalk gambling board and I even participate in those contests myself.

But, on this forum casinos aren't as active as they are on Bitcointalk, and those contests can be only possible if casinos get interested in this forum as well.

None of the current campaigns on this forum are of casinos. Some of the campaign managers successfully moved some casino campaigns on this forum but all of those are inactive currently.

Outbox is present on this forum as well but it's named as Sent items instead of outbox. Your messages don't get saved in outbox automatically, for that you'll have to select the option "Save a copy in my outbox" and then you may get your outbox messages saved there. If you have already selected that option during message sending then you can easily view outbox messages by clicking on sent items option.

07 - SamReomo

Signature has grown for me . The mine ended I am selling off all my gear.

I thought you will never sell your mining hardware but if signature campaigns are more effective for you then that's a good decision. Mining is surely not profitable anymore unless Bitcoin gain some value but as of now it's not that much profitable.

and also Lotto company seems to be hard to win the gambling battle because they are only promoting single game  than a regular casino that has many games to offer.

L0tt0.com isn't offering single game, at their casino we can find multiple games and all of those games are enjoyable for L0tt0 users. I believe that casino has huge potential of growth and the dev of that site is a very dedicated person.

With low pay rates, you can change all campaign participants every week, but you will still have poorly motivated or bad posters.

Yes, that's very true, low pay rates can allow a campaign manager to change participants and accept the ones who are happy to accept low pay rates but the ones who accept low pay rates will most probably have low level of motivation and they may also not be good level posters.

That's why I believe the pay rates shouldn't be decreased to the extent that good members would avoid being part of the campaigns which will ultimately decrease the number of good posters on forum and that's not a good thing at all.

I mean we are remembering the day when someone bought a pizza with 10,000 BTC, if we remember events like this, it could inspire the trust in BTC

Many people remember that event and on Bitcointalk it's celebrated each year. It's one of the most impactful events about Bitcoin and it really reminds us that how far we have gone.

Bitcoin was literally very low in value in 2009-2010 and now the ones who own it are the richest ones.

Satoshi's invention and vision has changed this world a lot and we all should be thankful to him that he created Bitcoin.